Partial List of Plants of the Sonoran Desert
Sorted by Scientific Name Synonyms
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| Synonym | Scientific Name | Common Name(s) | Photo |
|---|---|---|---|
| 1932 | Grusonia wrightiana (E.M.Baxter) E.M.Baxter, Calif. Cactaceae 58, 1935 | Parish Club-cholla | |
| 1937 | Grusonia wrightiana (E.M.Baxter) E.M.Baxter, Calif. Cactaceae 58, 1935 | Parish Club-cholla | |
| Abutilon pringlei | Abutilon incanum | Indian Mallow, pelotazo | * |
| Acacia angustissima | Acaciella angustissima | White-ball Acacia, Fern Acacia | * |
| Acacia constricta Bentham | Vachellia constricta (Bentham) Seigler & Ebinger | Whitethorn Acacia | * |
| Acacia farnesiana (Linnaeus) Willdenow | Vachellia farnesiana (Linnaeus) Wight & Arnott | ||
| Acacia greggii A.Gray | Senegalia greggii (A.Gray) Britton & Rose | Catclaw, Wait-a-minute Bush, una de gato, gatuno | * |
| Acacia greggii v.arizonica | Senegalia greggii (A.Gray) Britton & Rose | Catclaw, Wait-a-minute Bush, una de gato, gatuno | * |
| Acalypha pringlei | Acalypha californica | California Copperleaf, hierba del cancer, Copperleaf | * |
| Agrostis semiverticillata | Polypogon viridis | Water Bent Grass, Water Beard Grass | |
| Allionia incarnata v.nudata | Allionia incarnata | Trailing Four-o'clock, Windmills | * |
| Allionia incarnata v.villosa | Allionia incarnata | Trailing Four-o'clock, Windmills | * |
| Andropogon barbinodis | Bothriochloa barbinodis | Cane Bluestem, zacate popotillo | * |
| Andropogon contortus | Heteropogon contortus | Tanglehead, zacate colorado | * |
| Androsace occidentalis v.arizonicus | Androsace occidentalis | Western Rock-jasmine | |
| Antheropeas lanosum | Eriophyllum lanosum | White Easter Bonnets, Woolly Daisy (alternate leaves) | * |
| Antirrhinum cyathiferum | Pseudorontium cyathiferum | Desert Snapdragon | * |
| Antirrhinum filipes | Neogaerrhinum filipes (A.Gray) Rothmaler | Yellow Twining Snapdragon | |
| Antirrhinum kingii v.watsonii | Sairocarpus watsonii (Vasey & Rose) D.A.Sutton | Watsons Snapdragon | |
| Antirrhinum nuttalianum ssp. Subsessile | Sairocarpus nuttallianus (Bentham) D.A. Sutton | Lesser Snapdragon | |
| Antirrhinum watsonii | Sairocarpus watsonii (Vasey & Rose) D.A.Sutton | Watsons Snapdragon | |
| Arabis perennans | Boechera perennans | Perennial Rockcress | |
| Argythamnia neomexicana (Muller Argoviensis) | Argythamnia serrata (Torrey) Muller Argoviensis | New Mexico Silverbush | * |
| Arida arizonica (R.C.Jackson & R.R.Johnson) D.R.Morgan & R.L.Hartmann | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Arida carnosa (A.Gray) D.R.Morgan & R.L.Hartmann | Leucosyris carnosa (A.Gray) Greene | Alkali Aster | |
| Aristida gentilis | Aristida ternipes v.gentilis | Poverty Three-awn, zacate arana de tres barbas | * |
| Aristida glauca | Aristida purpurea v.nealleyi | Nealley Three-awn, tres barbas | * |
| Aristida hamulosa | Aristida ternipes v.gentilis | Poverty Three-awn, zacate arana de tres barbas | * |
| Aristida parishii | Aristida purpurea v.parishii | Parish Three-awn | * |
| Aristida ternipes v.hamulosa | Aristida ternipes v.gentilis | Poverty Three-awn, zacate arana de tres barbas | * |
| Aristolochia brevipes v acuminata | Aristolochia watsonii | Pipevine, Indian-root, Dutchman's pipe, hierba del indio, zapatito | |
| Artemisia.dracunculoides | Artemisia dracunculus | Tarragon, estragon | |
| Asarina antirrhiniflora | Maurandella antirrhiniflora (Humboldt & Bonpland ex Willdenow) Rothmale | Blue Snapdragon Vine, Blue Twining Snapdragon | * |
| Asarina filipes | Neogaerrhinum filipes (A.Gray) Rothmaler | Yellow Twining Snapdragon | |
| Aster carnosus | Leucosyris carnosa (A.Gray) Greene | Alkali Aster | |
| Aster intricatus | Leucosyris carnosa (A.Gray) Greene | Alkali Aster | |
| Aster tagetinus | Machaeranthera tagetina | Mesa Tansyaster | |
| Astrolepis sinuata (Lagasca ex Swartz) D.M.Benham & Windham ssp. Sinuata | Wavy Star-scaled Cloak Fern | * | |
| Atriplex canescens ssp. linearis | Atriplex linearis | Narrow-leaf saltbush | |
| Atriplex elegans ssp fasciculata | Atriplex elegans | Wheel-scale orach, chamiso cenizo | |
| Audibertia vaseyi | Salvia vaseyi | Scallop-leaf Sage | |
| Ayenia pusilla | Ayenia filiformis | Dwarf Ayenia | |
| Baccharis glutinosa | Baccharis salicifolia | Seep willow, batamote | * |
| Boerhavia caribaea | Boerhavia coccinea | Red Spiderling, Scarlet Spiderling | * |
| Boerhavia diffusa | Boerhavia coccinea | Red Spiderling, Scarlet Spiderling | * |
| Boerhavia intermedia | Boerhavia triquetra | Spiderling, juanamipili, juantilipin | |
| Boerhavia maculata | Boerhavia triquetra | Spiderling, juanamipili, juantilipin | |
| Boerhavia scandens | Commicarpus scandens | Climbing Wart-club | |
| Boerhavia triquetra v.intermedia | Boerhavia triquetra | Spiderling, juanamipili, juantilipin | |
| Bouteloua aristidoides v.arizonica | Bouteloua aristidoides | Six-weeks Needle grama, aceitilla, navajita aguja | * |
| Bouteloua filiformis | Bouteloua repens | Slender Grama, navajita delgada | |
| Bouteloua rothrockii | Bouteloua barbata v.rothrockii | Rothrock Grama, zacate liebrero | |
| Brachiaria arizonica | Urochloa arizonica | Arizona Signal Grass, piojillo de Arizona | * |
| Brassica eruca L. | Eruca vesicaria ssp.sativa | Arugala, Garden-rocket, Salad-rocket | |
| Brodiaea capitata v.pauciflora | Dichelostemma capitatum ssp. pauciflorum | Blue Dicks, Wild Hyacinth, coberia, cobena, ajo blanco | * |
| Brodiaea palmeri | Triteleiopsis palmeri | Blue Sand-lily | * |
| Bromus arizonicus (Shear) Stebbins | Bromus arizonicus (Shear) Stebbins | California Brome | * |
| Bromus carinatus v.arizonicus | Bromus arizonicus (Shear) Stebbins | California Brome | * |
| Bromus madritensis Linnaeus ssp. Rubens (Linnaeus) Husnot | Bromus rubens Linnaeus | Foxtail Brome, Red Brome, bromo rojo | * |
| Bromus marginatus | Bromus arizonicus (Shear) Stebbins | California Brome | * |
| Caesalpinia glauca | Hoffmanseggia glauca (Ortega) Eifert | Hog Potato, camote de raton | |
| Calandrinia ciliata v.meniessii | Calandrinia menziesii (Hooker) Torrey & A. Gray | Fringed Redmaids | * |
| Calyptridium monandrum | Calyptridium monandrum Nuttall | Sand-cress, Common Pussypaws | |
| Camissonia arenaria | Chylismia arenaria | Fortuna Suncup | * |
| Camissonia boothii ssp.condensata | Eremothera boothii ssp.condensata | Woody Bottle-washer | * |
| Camissonia brevipes | Chylismia brevipes | Golden Suncup | * |
| Camissonia californica | Eulobus californicus | California Suncup, Mustard Evening Primrose | * |
| Camissonia cardiophylla | Chylismia cardiophylla | Heartleaf Suncup | |
| Camissonia chamaenerioides | Eremothera chamaenerioides | Willow-herb Evening Primrose | * |
| Camissonia claviformis ssp.peeblesii | Chylismia claviformis ssp.peeblesii | Brown-eyed Evening Primrose, Browneyes | * |
| Camissonia claviformis ssp.peirsonii | Chylismia claviformis ssp. peirsonii | Peirson's Brown-eyed Evening Primrose | * |
| Camissonia claviformis ssp.rubescens | Chylismia claviformis ssp.rubescens | Brown-eyed Evening Primrose, Browneyes | * |
| Camissonia claviformis ssp.yumae | Chylismia claviformis ssp.yumae | Brown-eyed Evening Primrose, Browneyes | |
| Capparis atamisquea | Atamisquea emarginata | palo hediondo | |
| Capsicum annuum v.aviculare | Capsicum annuum v.glabriusculum | Chiltepin, chiltepin | |
| Capsicum indicum v.aviculare | Capsicum annuum v.glabriusculum | Chiltepin, chiltepin | |
| Cassia covesii | Senna covesii | Desert Senna, daisillo, hojasen | * |
| Castilleja chromosa | Castilleja lanata | Desert Paintbrush, Indian Paintbush | * |
| Caucalis microcarpa | Yabea microcarpa | False Carrot | |
| Caulanthus lasiophyllus (Hooker & Arnott) Payson | Streptanthus lasiophyllus (Hooker & Arnott) Hoover | Cutleaf Thelypodium, California Mustard | * |
| Celtis tala v.pallida | Celtis pallida | Desert Hackberry, garambullo | * |
| Cenchrus incertus | Cenchrus spinifex | Field Sandbur, Common Sandbur, huizapori, guachapori | * |
| Cenchrus pauciflorus | Cenchrus spinifex | Field Sandbur, Common Sandbur, huizapori, guachapori | * |
| Centaurium arizonicum | Zeltnera arizonica | Arizona centaury | |
| Centaurium calycosum v.arizonicum | Zeltnera arizonica | Arizona centaury | |
| Cercidium floridum | Parkinsonia florida | Blue Palo Verde | * |
| Cercidium microphyllum | Parkinsonia microphylla | Foothill Paloverde, palo verde | * |
| Cereus diguetii | Peniocereus striatus | sacamtraca, sarramatraca | * |
| Cereus giganteus | Carnegia gigantea | Saguaro, Sahuaro, Giant Cactus | * |
| Cereus greggii v. transmontanus | Peniocereus greggii v. transmontanus | Cereus, reina de la noche, Desert Night-blooming Cereus, sarramatraca | * |
| Cereus schottii | Lophocereus schottii v.schottii | Senita Cactus, sinita | * |
| Cereus striatus | Peniocereus striatus | sacamtraca, sarramatraca | * |
| Cereus thurberi | Stenocereus thurberi | Organ Pipe Cactus, pitaya, pitaya dulce | * |
| Chamaecrista nictitans ssp. nictitans v. mensalis (Greenman) Gandhi & S.L.Hatch | Chamaecrista nictitans (L.) Moench v. leptadenia (Greenman) Gandhi & S.L.Hatch | ||
| Chamaesyce abramsiana | Euphorbia abramsiana | Desert Sandmat, Abrams Spurge, golondrina | |
| Chamaesyce albomarginata | Euphorbia albomarginata | Rattlesnake Weed, golondrina | * |
| Chamaesyce arizonica | Euphorbia arizonica | Arizona Spurge, golondrina | |
| Chamaesyce capitellata | Euphorbia capitellata | Head Sandmat | |
| Chamaesyce eriantha | Euphorbia eriantha | Beetle Spurge | * |
| Chamaesyce florida | Euphorbia florida | Flowery Spurge | |
| Chamaesyce heterophylla | Euphorbia heterophylla | Mexican Fireplant | |
| Chamaesyce hyssopifolia | Euphorbia hyssopifolia | Hyssop Spurge | |
| Chamaesyce melanadenia | Euphorbia melanadenia | golondrina | |
| Chamaesyce micromera | Euphorbia micromera | golondrina | |
| Chamaesyce pediculifera | Euphorbia pediculifera var. pediculifera | Louse Spurge, golondrina | * |
| Chamaesyce polycarpa | Euphorbia polycarpa | Desert Spurge, golondrina | * |
| Chamaesyce prostrata | Euphorbia prostrata | Prostrate Spurge | |
| Chamaesyce setiloba | Euphorbia setiloba | Fringed Spurge, Yuma sandmat, golondrina | * |
| Chamaesyce spathulata | Euphorbia spathulata | Warty Spurge | |
| Chamaesyce trachysperma | Euphorbia trachysperma | San Pedro River Sandmat, San Pedro River Broomspurge | |
| Cheilanthes cochisensis | Astrolepis cochisensis (Goodding) D.M.Benham & Windham | Scaly Cloak Fern | * |
| Cheilanthes deserti | Notholaena californica D.C.Eaton ssp.californica | Indian Fern, California Cloak Fern | * |
| Cheilanthes lindheimeri Hooker | Cheilanthes lindheimeri (Hooker) | Fairy Swords | |
| Cheilanthes parryi (D.C.Eaton) Domin | Cheilanthes parryi (D.C.Eaton) Domin | Parry's Lip Fern | * |
| Cheilanthes sinuata | Astrolepis sinuata (Lagasca ex Swartz) D.M.Benham & Windham ssp. Sinuata | Wavy Star-scaled Cloak Fern | * |
| Cheilanthes standleyi | Notholaena standleyi Maxon | Star Cloak Fern | * |
| Cheilanthes villosa Davenport ex Maxon | Cheilanthes villosa Davenport ex Maxon | Hairy Lip Fern | * |
| Cheilanthes wrightii Hooker | Cheilanthes wrightii Hooker | Wrights Lip Fern | * |
| Cheilanthes yavapensis T.Reeves ex Windham | Cheilanthes yavapensis T. Reeves ex Windham | Yavapai Lip Fern | |
| Chenopodium murale Linnaeus | Chenopodiastrum murale (Linnaeus) S. Fuentes, Uotilla & Borsch | Netleaf goosefoot, chual, choal | |
| Chloris crinita | Leptocholoa crinita (Lagasca) P.M.Peterson & N.Snow | Feather Finger Grass | |
| Coldenia plicata | Tiquilia plicata | Fanleaf Crinklemat | |
| Coleogeton pectinatus | Stuckenia pectinata | Sago Pondweed | |
| Condalia lycioides v.canescens | Ziziphus obtusifolia var. canescens | White Crucillo, Graythorn, abrojo | * |
| Conyza canadensis | Erigeron canadensis | Horseweed, cola de caballo | |
| Conyza coulteri | Laennecia coulteri | Coulter's Horseweed | |
| Corynopuntia kunzei | Grusonia kunzei Rose) Pinkava | Desert-club Cholla, Devil Cholla | * |
| Coursetia microphylla | Coursetia glandulosa | Baby Bonnets, samota | * |
| Crassula connata v.eremica | Crassula connata | Pigmy-weed, Pygmy Stonecrop | |
| Cryptantha angustifolia (Torrey) Greene | Johnstonella angustifolia Torrey) Hasenstab & M.G.Simpson | Panamint Cat's Eye, Popcorn Flower, Narrow-leaf Cryptantha, Desert Cryptantha | * |
| Cryptantha holoptera (A.Gray) J.F.Macbride | Johnstonella holoptera (A.Gray) Hasenstab & M.G. Simpson | Winged Cryptantha | |
| Cryptantha maritima v.maritima | Cryptantha maritima | White-haired cryptantha | |
| Cryptantha maritima v.pilosa | Cryptantha maritima | White-haired cryptantha | |
| Cryptantha micrantha (Torrey) I.M. Johnson v. micrantha | Eremocarya micrantha (Torrey) Greene ssp. micrantha | Dwarf Cryptantha | |
| Cryptantha racemosa (S.Watson ex A.Gray) Greene | Johnstonella racemosa (S.Watson ex A.Gray) Brand | Bushy Cryptantha | |
| Cuscuta salina Engelmann v. salina | Cuscuta salina Engelmann | Salt Dodder, fideo | |
| Cuscuta umbellata v. reflexa | Cuscuta legitima | Dodder | |
| Cynanchum arizonicum | Metastelma arizonicum | Arizona Swallow-wort, Arizona Climbing Milkweed | |
| Cyperus aristatus | Cyperus squarrosus | Dwarf Sedge | |
| Cyperus asper | Cyperus mutisii | Mutis Flatsedge | |
| Cyperus esculentus v. leptostachyus Boekeler | Cyperus esculentus Linnaeus | Yellow Nutgrass, coquillo amarillo, cebollin | |
| Dalea emory | Psorothamnus emoryi var. emoryi | Emory indigo-bush, Emory's smokebush | * |
| Dalea fremontii | Psorothamnus fremontii | Fremont's Dalea | |
| Dalea parryi | Marina parryi | Parry Dalea, Parrys False Prairie Clover | * |
| Dalea spinosa | Psorothamnus spinosus | Smoke Tree, palo cenizo | * |
| Datura wrightii | Datura discolor Bernhardi | Desert Datura, Sacred Datura, Thornapple, Western Jimson | * |
| Desmodium procumbens v.exiguum | Desmodium procumbens | Western Tickfoil | |
| Desmodium procumbens v.transversum | Desmodium procumbens | Western Tickfoil | |
| Dichelostema pulchellum v.pauciflorum | Dichelostemma capitatum ssp. pauciflorum | Blue Dicks, Wild Hyacinth, coberia, cobena, ajo blanco | * |
| Diplachne dubia | Disakisperma dubium (Kunth) P.M.Peterson & N.Snow | Green Sprangletop | |
| Diplachne uninervia | Diplachne fusca (Linnaeus) P.Beauvois es Roemer & Schultz ssp.uninervia (J.Presl) P.M.Peterson & N.Snow | Mexican Sprangletop | |
| Distichlis stricta | Distichlis spicata | Salt Grass, zacate salado | |
| Ditaxis adenophora (A.Gray) Pax & K.Hoffman | Argythamnia adenophora A.Gray | Glandular Silverbush | |
| Ditaxis brandegeei (Millspaugh) Rose & Standley v. intonsa I.M.Johnston | Argythamnia brandegeei Millspaugh var. intonsa (I.M.Johnston) J.W.Ingram | Sonoran Silverbush | |
| Ditaxis lanceolata (Bentham) Pax & K.Hoffman | Argythamnia lanceolata (Bentham) Muller Argoviensis | Narrowleaf Silverbush | * |
| Ditaxis neomexicana (Muller Argoviensis) A.Heller | Argythamnia serrata (Torrey) Muller Argoviensis | New Mexico Silverbush | * |
| Ditaxis serrata (Torrey) A. Heller | Argythamnia serrata (Torrey) Muller Argoviensis | New Mexico Silverbush | * |
| Dodonea angustifolium | Dodonaea viscosa v.angustifolia | Hopbush, torachico | * |
| Draba cuneifolia Nuttall ex Torrey & A.Gray | Tomostima cuneifolia (Nuttall ex Torrey & A.Gray) Al-Shehbaz, M.Koch & Jordon-Thaden | Wedgeleaf Draba | * |
| Draba cuneifolia v.integrifolia | Tomostima cuneifolia (Nuttall ex Torrey & A.Gray) Al-Shehbaz, M.Koch & Jordon-Thaden | Wedgeleaf Draba | * |
| Draba cuneifolia v.sonorae | Tomostima cuneifolia (Nuttall ex Torrey & A.Gray) Al-Shehbaz, M.Koch & Jordon-Thaden | Wedgeleaf Draba | * |
| Dudleya pulverulenta ssp. Arizonica | Dudleya arizonica | Gila Liveforever, Arizona Liveforever | * |
| Dyssodia pentachaeta v.belenidium | Thymophylla pentachaeta v.belenidium | Common dogweed, Five-needle Prickly-leaf | |
| Dyssodia porophylloides | Adenophyllum porophylloides | Adenophyllum, Dogweed | * |
| Echeveria arizonica | Dudleya arizonica | Gila Liveforever, Arizona Liveforever | * |
| Echinocactus polycephalus v. polycephalus | Echinocactus polycephalus Englemann & J.M.Bigelow | Cottontop Cactus, Many-headed Barrel Cactus, Cannonball Cactus, biznaga | * |
| Echinocereus engelmannii (Parry ex Engelmann) Lemaire v.acicularis L.D.Benson | Echinocereus engelmannii (Parry ex Engelmann) Lemaire v. engelmannii | Strawberry Hedgehog Cactus, pitayita | * |
| Echinocereus engelmannii v. chrysocentrus (engelmann & J.M.Bigelow) Rumpler | Echinocereus engelmannii (Parry ex Engelmann) Lemaire v. engelmannii | Strawberry Hedgehog Cactus, pitayita | * |
| Echinocereus santaritensis W.Blum & Rutow | Echinocereus coccineus Engelmann ssp. santaritensis (W.Blum & Rutow) M.A.Baker | Claret-cup Cactus | |
| Echinomastus acunensis | Sclerocactus johnsonii (Parry ex Engelmann) N.P.Taylor | Acuna Cactus | * |
| Echinomastus erectocentrus (J.M.Coulter) Britton & Rose v. acunensis (W.T.Marshall) Bravo | Sclerocactus johnsonii (Parry ex Engelmann) N.P.Taylor | Acuna Cactus | * |
| Eclipta alba | Eclipta prostrata | False Daisy, chile de agua, hierba del tajo | |
| Eclipta erecta | Eclipta prostrata | False Daisy, chile de agua, hierba del tajo | |
| Ephedra nevadensis v.aspera | Ephedra aspera Engelmann ex S. Watson | Mormon Tea, Boundary Ephedra, tepopote, canutillo | * |
| Eragrostis arida | Eragrostis pectinacea | Carolina Love Grass | |
| Eragrostis diffusa | Eragrostis pectinacea | Carolina Love Grass | |
| Eragrostis lemmonii v.gracilis | Eriochloa acuminata | Southwestern Cup Grass, zacate taza | |
| Eragrostis pectinacea v.miserrima | Eragrostis pectinacea | Carolina Love Grass | |
| Eragrostis tephrosanthes | Eragrostis pectinacea | Carolina Love Grass | |
| Erigeron divergens | Erigeron lobatus | Desert Fleabane | * |
| Eriogonum deflexum v.turbinatum | Eriogonum deflexum v.deflexum | Skeleton Weed | * |
| Eriogonum wrightii v.pringlei | Eriogonum wrightii v.nodosum | Wright buckwheat | |
| Erioneuron pulchellum | Dasyochloa pulchella | Fluff Grass, zacate borreguerro | * |
| Eruca sativa | Eruca vesicaria ssp.sativa | Arugala, Garden-rocket, Salad-rocket | |
| Erysimum capitatum v.purshii | Erysimum capitatum | Western Wallflower | |
| Eupatorium palmeri | Koanophyllon palmeri | Umbrella Thoroughwort | |
| Eupatorium pauperculum | Ageratina paupercula | Santa Rita Snakeroot | |
| Evax multicaulis | Diaperia verna v. verna | Spring Pygmy Cudweed, Rabbit Tobacco | |
| Evax verna v. verna | Diaperia verna v. verna | Spring Pygmy Cudweed, Rabbit Tobacco | |
| Evolvulus alsinoides v. acapulcensis | Evolvulus alsinoides | Mouse Ears | |
| Evolvulus alsinoides v. angustifolia | Evolvulus alsinoides | Mouse Ears | |
| Fagonia californica v.glutinosa | Fagonia pachyacantha | Sticky fagonbush | |
| Fagonia longipes | Fagonia longipes Standley | California Fagonia | * |
| Ferocactus acanthodes | Ferocactus cylindraceus | Mountain Barrel Cactus, Desert Barrel Cactus, biznaga | * |
| Ferocactus acanthodes v.lecontei | Ferocactus cylindraceus | Mountain Barrel Cactus, Desert Barrel Cactus, biznaga | * |
| Ferocactus aconthodes v.eastwoodiae | Ferocactus cylindraceus | Mountain Barrel Cactus, Desert Barrel Cactus, biznaga | * |
| Ferocactus covillei | Ferocactus emoryi | Emory's Barrel Cactus, Coville Barrel Cactus, biznaga | * |
| Filago arizonica | Logfia arizonica | Arizona Fluffweed | |
| Filago californica | Logfia filaginoides | California Fluffweed | |
| Filago depressa | Logfia depressa | Dwarf Fluffweed | |
| Forestiera shrevei | Forestiera phillyreoides | Desert Olive | * |
| Franseria ambrosioides | Ambrosia ambrosioides | Canyon ragweed, Giant Bur-sage | * |
| Franseria cordifolia | Ambrosia cordifolia | Heart-leaf Bur-sage | * |
| Franseria deltoidea | Ambrosia deltoidea | Triangle-leaf Bur-sage, chamizo forrajero | * |
| Franseria dumosa | Ambrosia dumosa | White Bur-sage, chamizo | * |
| Franseria ilicifolia | Ambrosia ilicifolia | Holly-leaf Bur-sage | * |
| Funastrum. cynanchoides v. hartwegii | Funastrum hartwegii | Climbing milkweed, guirote | * |
| Funastrum heterophyllum | Funastrum hartwegii | Climbing milkweed, guirote | * |
| Gaillardia arizonica v.pringlei | Gaillardia arizonica | Arizona Blanket-Flower | * |
| Galium stellatum v.eremicum | Galium stellatum | Starry Bedstraw | * |
| Gaura parviflora | Oenothera curtiflora | Lizard-tail, Velvet-leaf Gaura | * |
| Gilia latifolia | Aliciella latifolia ssp.latifolia | Broad-leaf Gilia | |
| Gilia multiflora | Ipomopsis multiflora | Many-flowered Gilia | |
| Gilia ophthalmoides ssp. Australis | Gilia flavocincta ssp.australis | Lesser Yellowthroat Gilia | |
| Glandularia bipinnatifida (Nuttall) Nuttall v. latilobata (L.M.Perry) B.L.Turner | Glandularia latiloba (L.M.Perry) G.L.Nesom | Prairie Verbena, Dakota Mock Vervain | |
| Gnaphalium canescens | Pseudognaphalium canescens | Wright's Cudweed | |
| Gnaphalium stagnale | Gamochaeta stagnalis | Desert Cudweed, Rosy Everlasting | |
| Greenella arizonica | Gutierrezia arizonica | Arizona Snakeweed | |
| Grusonia kunzei (Rose) Pinkava misapplied to G. Wrightii in Flora area | Grusonia wrightiana (E.M.Baxter) E.M.Baxter, Calif. Cactaceae 58, 1935 | Parish Club-cholla | |
| Grusonia parishii (Orcutt) Pinkava misapplied to G.Kunzei in the Flora area D.Pinkava & M.Baker | Grusonia kunzei Rose) Pinkava | Desert-club Cholla, Devil Cholla | * |
| Guillenia lasiophylla | Streptanthus lasiophyllus (Hooker & Arnott) Hoover | Cutleaf Thelypodium, California Mustard | * |
| Haplopappus acradenius | Isocoma acradenia var. acradenia | Alkali Goldenbush | * |
| Haplopappus cuneatus v.spathulata | Ericameria cuneata v. spathulata | Wedgeleaf Goldenbush | |
| Haplopappus gracilis | Xanthisma gracile (Nuttall) D.R.Morgan & R.L.Hartmann | Yellow Spiny Daisy, Slender Goldenweed | * |
| Haplopappus laricifolius | Ericameria laricifolia | Turpentine Bush | * |
| Haplopappus spinulosus ssp.gooddingii | Xanthisma spinulosum v.gooddingii | Spiny Goldenweed, | * |
| Haplophyton cimicidum v. crooksii | Haplophyton cimicidum | Cockroach Plant, hierba de la cucharocha | |
| Haplophyton crooksii | Haplophyton cimicidum | Cockroach Plant, hierba de la cucharocha | |
| Heliotropium curassavicum v.oculatum | Heliotropium curassavicum | Alkali Heliotrope, hierba del sapo | |
| Hilaria belangeri v.longifolia | Hilaria belangeri | Curly Mesquite, zacate chino | |
| Hofmeisteria laphamioides | Pleurocoronis laphamioides | Pleurocoronis | |
| Hofmeisteria pluriseta | Pleurocoronis pluriseta | Arrow-leaf, canutillo | |
| Holacantha emoryi | Castela emoryi | Crucifixion-thorn, corona de cristo | * |
| Hordeum leporinum ssp.glaucum | Hordeum murinum ssp.glaucum | Wild Barley, cebadilla silvestre | * |
| Hordeum stebbinsii | Hordeum murinum ssp.glaucum | Wild Barley, cebadilla silvestre | * |
| Hymenoclea monogyra | Ambrosia monogyra | Slender burrobrush, jecota | |
| Hymenoclea salsola var. pentalepis | Ambrosia salsola var. pentalepis | White burrobrush, Cheesebush | * |
| Hyptis albida Kunth | Condea albida (Kunth) Harley & J.F.B.Pastore | Desert Lavender, salvia | * |
| Hyptis emoryi | Condea albida (Kunth) Harley & J.F.B.Pastore | Desert Lavender, salvia | * |
| Ipomoea coccinea | Ipomoea cristulata | Scarlet Morning-glory, Star-glory | |
| Jacobinia ovata | Justicia candicans | Jacobinia, Chuparossa | * |
| Janusia gracilis | Cottsia gracilis | fermina | * |
| Juncus arcticus v.mexicana | Juncus mexicanus | Mexican Rush, Wire Rush | |
| Juniperus coahuilensis v.arizonica | Juniperus arizonica | Arizona Juniper, Red Berry Juniper | * |
| Juniperus erythrocarpa | Juniperus arizonica | Arizona Juniper, Red Berry Juniper | * |
| Juniperus monosperma | Juniperus arizonica | Arizona Juniper, Red Berry Juniper | * |
| Krameria grayi | Krameria bicolor | White Rhatany, cosahul | * |
| Krameria parviflora | Krameria erecta | Range Rhatany, Little-leaf Rhatany, cosahul | |
| Langloisia schottii | Loeseliastrum schottii | Schotts Calico | |
| Lappula occidentalis | Lappula occidentalis var. stricta (S.Watson) S.J.Rolfsmeier | Crowned Stickseed | |
| Lappula redowskii (Hornemann) Greene v. cuspidata | Lappula occidentalis var. stricta (S.Watson) S.J.Rolfsmeier | Crowned Stickseed | |
| Larrea divaricata subsp. tridentata | Larrea tridentata (Sessé & Moçiño ex de Candolle) Coville var. tridentata | Creosote Bush, hediondilla, gobernadora | * |
| Lemaireocereus thurberi | Stenocereus thurberi | Organ Pipe Cactus, pitaya, pitaya dulce | * |
| Leptochloa brachiata | Dinebra panicea (Retzius) P.M.Peterson & N..Snow ssp.brachiata (Stuedel) P.M. Peterson & N.Snow | Red Sprangletop, zacate salado, desparramo rojo | * |
| Leptochloa dubia (Kunth) Nees | Disakisperma dubium (Kunth) P.M.Peterson & N.Snow | Green Sprangletop | |
| Leptochloa filiformis | Dinebra panicea (Retzius) P.M.Peterson & N..Snow ssp.brachiata (Stuedel) P.M. Peterson & N.Snow | Red Sprangletop, zacate salado, desparramo rojo | * |
| Leptochloa fusca (Linnaeus) Kunth ssp. Uninervia (J.Presl) N.Snow | Diplachne fusca (Linnaeus) P.Beauvois es Roemer & Schultz ssp.uninervia (J.Presl) P.M.Peterson & N.Snow | Mexican Sprangletop | |
| Leptochloa panicea (Retzius) Ohwi ssp.braceata (Steudel) N.Snow | Dinebra panicea (Retzius) P.M.Peterson & N..Snow ssp.brachiata (Stuedel) P.M. Peterson & N.Snow | Red Sprangletop, zacate salado, desparramo rojo | * |
| Leptochloa uninervia | Diplachne fusca (Linnaeus) P.Beauvois es Roemer & Schultz ssp.uninervia (J.Presl) P.M.Peterson & N.Snow | Mexican Sprangletop | |
| Leptochloa viscida (Scribner) Beal | Dinebra viscida (Scribner) P.M.Peterson & N.Snow | Sticky Sprangletop, zacate salado pegajoso | * |
| Lesquerella gordoni | Physaria tenella | Desert Bladderpod | |
| Lesquerella gordoni v.sessilis | Physaria tenella | Desert Bladderpod | |
| Lesquerella tenella | Physaria tenella | Desert Bladderpod | |
| Leucosyris cornosa | Leucosyris carnosa (A.Gray) Greene | Alkali Aster | |
| Linanthus aureus (Nuttall) Greene | Leptosiphon chrysanthus J.M. Porter & R. Patterson subsp. chrysanthus [ | Golden Desert-trumpets | |
| Linum perenne v.lewisii | Linum bienne Miller | Prairie Flax | |
| Loefflingia squarrosa ssp.cactorum | Loeflingia squarrosa | Spreading Pygmy-leaf | |
| Logfia californica | Logfia filaginoides | California Fluffweed | |
| Lotus humistratus | Acmispon brachycarpus | Hill Locust | * |
| Lotus rigidus (Bentham) Greene | Acmispon rigidus (Bentham) Brouillet | Desert rock-pea | * |
| Lotus salsuginosus v.brevivexillus | Acmispon maritimus v.brevivexillus | Bird-foot Trefoil | |
| Lotus strigosus (Nuttall) Greene var. tomentellus (Greene) Isely | Acmispon strigosus (Nuttall) Brouillet | Hairy lotus | * |
| Lotus tomentellus Greene | Acmispon strigosus (Nuttall) Brouillet | Hairy lotus | * |
| Lupinus arizonicus v.sonorensis | Lupinus arizonicus | Arizona Lupine, lupino | * |
| Lupinus sparsiflorus ssp.mohavensis | Lupinus sparsiflorus | Arroyo Lupine, Coulters Lupine | * |
| Lupinus sparsiflorus v.mohavensis | Lupinus sparsiflorus | Arroyo Lupine, Coulters Lupine | * |
| Lycium andersonii v.deserticola | Lycium andersonii v.andersonii | Desert Wolfberry, salicieso | * |
| Lycium californicum v.arizonicum | Lycium californicum v.californicum | California Desert-thorn | |
| Lycurus alopecuroides | Muhlenbergia phleoides (Kunth) Columbus | Bristly Wolftail | |
| Lycurus phleoides | Muhlenbergia phleoides (Kunth) Columbus | Bristly Wolftail | |
| Lycurus setosus | Muhlenbergia phleoides (Kunth) Columbus | Bristly Wolftail | |
| Lygodesmia exigua | Prenanthella exigua | Brightwhite | |
| Machaeranthera. ammophila | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Machaeranthera. arida | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Machaeranthera. arizonica | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Machaeranthera asteroides v. glandulosa | Dieteria asteroides v. glandulosa | Fall Tansy-aster | |
| Machaeranthera carnosa v. intricata | Leucosyris carnosa (A.Gray) Greene | Alkali Aster | |
| Machaeranthera coulteri v. arida | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Machaeranthera gracilis | Xanthisma gracile (Nuttall) D.R.Morgan & R.L.Hartmann | Yellow Spiny Daisy, Slender Goldenweed | * |
| Machaeranthera pinnatifida v.gooddingii | Xanthisma spinulosum v.gooddingii | Spiny Goldenweed, | * |
| Mahonia haematocarpa | Berberis haematocarpa | Red Barberry | |
| Malacothrix californica v.glabrata | Malacothrix glabrata | Smooth Desert-dandelion | * |
| Malvastrum rotundifolium | Eremalche rotundifolium | Desert five-spot | * |
| Mammillaria fasciculata | Mammillaria thornberi | Thornber Fishhook Cactus, cabeza de viejo | |
| Mammillaria grahamii v.arizonica | Mammillaria grahamii ssp.grahamii | Arizona Fishhook Cactus, Pincushion Cactus, cabeza de viejo | * |
| Mammillaria grahamii v.oliviae | Mammillaria grahamii ssp.grahamii | Arizona Fishhook Cactus, Pincushion Cactus, cabeza de viejo | * |
| Mammillaria microcarpa | Mammillaria grahamii ssp.grahamii | Arizona Fishhook Cactus, Pincushion Cactus, cabeza de viejo | * |
| Mammillaria milleri | Mammillaria grahamii ssp.grahamii | Arizona Fishhook Cactus, Pincushion Cactus, cabeza de viejo | * |
| Mariscus mutisii | Cyperus mutisii | Mutis Flatsedge | |
| Mariscus squarrosus | Cyperus squarrosus | Dwarf Sedge | |
| Matricaria globifera | Oncosiphon piluliferum | Pineapple-weed, False Chamomile, manzanilla | |
| Matthiola bicornis | Matthiola longipetala | Night-scented Stock | |
| Maurandella antirrhiniflora (Humboldt & Bonpland ex Willdenow) Rothmale | Blue Snapdragon Vine, Blue Twining Snapdragon | * | |
| Maurendella antirrhiniflora | Maurandella antirrhiniflora (Humboldt & Bonpland ex Willdenow) Rothmale | Blue Snapdragon Vine, Blue Twining Snapdragon | * |
| Medicago hispida | Medicago polymorpha | Burclover | |
| Menodora scoparia | Menodora scabra | Twinberry, Rough Menodora | * |
| Mentzelia involucrata v.megalantha | Mentzelia involucrata | Stickleaf, Silver Blazing-Star, pega pega | * |
| Mentzelia longiloba v. yavaipensis J.J.Schenk & L.Hufford | Mentzelia longiloba J. Darlington v. longiloba | Blazing Star | * |
| Mentzelia multiflora var. longiloba | Mentzelia longiloba J. Darlington v. longiloba | Blazing Star | * |
| Mentzelia oreophila | Mentzelia puberula | Argus Blazing Star | |
| Mentzelia pumila var. multiflora | Mentzelia longiloba J. Darlington v. longiloba | Blazing Star | * |
| Microseris lindleyi | Uropappus lindleyi | Silverpuffs | * |
| Microseris linearifolia | Uropappus lindleyi | Silverpuffs | * |
| Mimosa laxiflora | Mimosa distachya v.laxiflora | Arizona Mimosa, garabatillo | * |
| Mimulus cordatus Greene | Erythranthe cordata (Greene) G.L.Nesom | Seep Monkey Flower | * |
| Mimulus guttatus Fischer ex de Candolle | Erythranthe cordata (Greene) G.L.Nesom | Seep Monkey Flower | * |
| Mimulus rubellus A.Gray | Erythranthe rubella (A.Gray) N.S.Fraga | Little Monkey Flower | |
| Mirabilis bigelovii | Mirabilis laevis v.villosa | Desert Four o'clock, Desert Wishbone Bush | * |
| Montia mexicana | Claytonia perfoliata Donn ex Willdenow subsp. mexicana (Rydberg) J.M. Miller & K.L. Chambers | Miner's Lettuce | * |
| Montia perfoliata | Claytonia perfoliata Donn ex Willdenow subsp. mexicana (Rydberg) J.M. Miller & K.L. Chambers | Miner's Lettuce | * |
| Muhlenbergia alopecuroides (Grisebach) P.M.Peterson & Columbus | Muhlenbergia phleoides (Kunth) Columbus | Bristly Wolftail | |
| Muhlenbergia gooddingii | Muhlenbergia emersleyi | Bullgrass, Bull Muhly, zacate de toro | |
| Muhlenbergia monticola | Muhlenbergia tenuifolia | Slender Muhly | |
| Nama coulteri | Nama hispidum v.spathulatum | Bristly Nama, morada, Sandbells | |
| Nemacladus glanduliferus v.orientalis | Nemacladus orientalis | Threadstem, Red-tip Thread Plant | * |
| Neoevansia striata | Peniocereus striatus | sacamtraca, sarramatraca | * |
| Neogaerrhinum filipes | Neogaerrhinum filipes (A.Gray) Rothmaler | Yellow Twining Snapdragon | |
| Neolloydia erectocentra v.acunensis | Sclerocactus johnsonii (Parry ex Engelmann) N.P.Taylor | Acuna Cactus | * |
| Nicotiana trigonophylla | Nicotiana obtusifolia | Desert Tobacco, tobaco del coyote, Coyote tobacco | * |
| Notholaena cochisensis | Astrolepis cochisensis (Goodding) D.M.Benham & Windham | Scaly Cloak Fern | * |
| Notholaena limitanea v.limitanea | Argyrochosma limitanea ssp.limitanea | Southwestern False Cloak-fern | |
| Notholaena parryi | Cheilanthes parryi (D.C.Eaton) Domin | Parry's Lip Fern | * |
| Notholaena sinuata | Astrolepis sinuata (Lagasca ex Swartz) D.M.Benham & Windham ssp. Sinuata | Wavy Star-scaled Cloak Fern | * |
| Notholaena sinuata v.cochisensis | Astrolepis cochisensis (Goodding) D.M.Benham & Windham | Scaly Cloak Fern | * |
| Oenothera avita ssp.arizonica | Oenothera arizonica | Arizona Evening Primrose | * |
| Oenothera brevipes | Chylismia brevipes | Golden Suncup | * |
| Oenothera californica ssp.arizonica | Oenothera arizonica | Arizona Evening Primrose | * |
| Oenothera cardiophylla | Chylismia cardiophylla | Heartleaf Suncup | |
| Oenothera deltoides v.arizonica | Oenothera arizonica | Arizona Evening Primrose | * |
| Oenothera leptocarpa | Eulobus californicus | California Suncup, Mustard Evening Primrose | * |
| Oenothera primiveris ssp.primiveris | Oenothera primiveris | Yellow Desert Evening-primrose | * |
| Opuntia acanthocarpa | Cylindropuntia acanthocarpa | Buckhorn Cholla | |
| Opuntia acanthocarpa v.coloradensis | Cylindropuntia acanthocarpa v.coloradensis | Buckhorn Cholla | * |
| Opuntia acanthocarpa v.major | Cylindropuntia acanthocarpa v.major | Buckhorn Cholla | |
| Opuntia arbuscula | Cylindropuntia arbuscula | Pencil Cholla | * |
| Opuntia bigelovii | Cylindropuntia bigelovii | Teddybear Cholla, choya guera | * |
| Opuntia echinocarpa | Cylindropuntia echinocarpa | Silver Cholla | * |
| Opuntia fulgida | Cylindropuntia fulgida | Chain-fruit Cholla, choya | |
| Opuntia fulgida v.fulgida | Cylindropuntia fulgida var. fulgida | Chain-fruit Cholla, choya | * |
| Opuntia fulgida v.mamillata | Cylindropuntia fulgida var. mammillata | Spineless Chain-fruit Cholla | * |
| Opuntia kunzei | Grusonia kunzei Rose) Pinkava | Desert-club Cholla, Devil Cholla | * |
| Opuntia leptocaulis | Cylindropuntia leptocaulis | Desert Christmas Cholla, tasajillo | * |
| Opuntia linguiformis | Opuntia engelmannii v.linguiformis | Cow-tongue Prickly Pear | |
| Opuntia phaecantha v.discata | Opuntia engelmannii | Engelmann Prickly pear | |
| Opuntia phaecantha v.flavispina | Opuntia engelmannii var. engelmannii | Desert Prickly Pear | * |
| Opuntia ramossissima | Cylindropuntia ramosissima | Diamond Cholla | * |
| Opuntia spinosior | Cylindropuntia spinosior | Cane Cholla | * |
| Opuntia stanlyi v.kunzei | Grusonia kunzei Rose) Pinkava | Desert-club Cholla, Devil Cholla | * |
| Opuntia versicolor | Cylindropuntia versicolor | Staghorn Cholla | * |
| Opuntia wigginsii | Cylindropuntia echinocarpa | Silver Cholla | * |
| Opuntia wrightiana (E.M.Baxter) Peebles. Desert Plant Life 9:45 | Grusonia wrightiana (E.M.Baxter) E.M.Baxter, Calif. Cactaceae 58, 1935 | Parish Club-cholla | |
| Opuntia wrightiana Baxter. Cactus and Succ. Jour. 4:283 | Grusonia wrightiana (E.M.Baxter) E.M.Baxter, Calif. Cactaceae 58, 1935 | Parish Club-cholla | |
| Orthocarpus exsertus | Castilleja exserta ssp.exserta | Purple Owls Clover | * |
| Orthocarpus purpurascens | Castilleja exserta ssp.exserta | Purple Owls Clover | * |
| Pachycereus schottii | Lophocereus schottii v.schottii | Senita Cactus, sinita | * |
| Panicum arizonicum | Urochloa arizonica | Arizona Signal Grass, piojillo de Arizona | * |
| Panicum capillare v.hirticaule | Panicum hirticaule var. hirticaule | Mexican panicgrass | * |
| Panicum lepidulum | Panicum hallii | Halls Witch Grass | |
| Panicum obtusum | Hopia obtusa | Vine Mesquite, zacate de quia | |
| Parietaria hespera | Parietaria hespera v.hespera | Desert Pellitory | |
| Pectis linifolia v.marginalis | Pectis linifolia v.linifolia | romero macho | |
| Pectis punctata | Pectis linifolia v.linifolia | romero macho | |
| Pennisetum ciliare | Cenchrus ciliaris | Buffelgrass, zacate buffel | |
| Pennisetum ruppelii | Cenchrus setaceus | Fountain Grass | * |
| Pennisetum setaceum | Cenchrus setaceus | Fountain Grass | * |
| Penstemon microphyllus | Keckiella antirrhinoides | Bush Penstemon | |
| Perezia nana | Acourtia nana | Desert Holly | |
| Perezia wrightii | Acourtia wrightii | Brown-foot | |
| Phacelia ambigua | Phacelia crenulata v.ambigua | Scorpionweed, Desert Heliotrope | * |
| Phacelia minutiflora | Phacelia crenulata v.ambigua | Scorpionweed, Desert Heliotrope | * |
| Phacelia ramosissima v.latifolia | Phacelia ramosissima | Branching Phacelia | |
| Phaseolus wrightii | Phaseolus filiformis Bentham | Slim-Jim Bean, Desert Bean | * |
| Phragmites communis | Phragmites australis ssp.berlandieri | Common Reed, Reed Grass, carrizo | |
| Physalis crassifolia var. versicolor | Physalis versicolor | Desert Ground-cherry, tomatillo del desierto | * |
| Physalis wrightii | Physalis acutifolia | Sharpleaf Ground-cherry | |
| Pityrogramma triangularis v.maxonii | Pentagramma triangularis (Kaulfuss) Yatskievych et al. v.maxonii (Weatherby) Yatskievych et al. | Goldback Fern | |
| Plantago fastigiata | Plantago ovata | Woolly Plantain, Indian Wheat, pastora | |
| Plantago insularis | Plantago ovata | Woolly Plantain, Indian Wheat, pastora | |
| Plantago insularis v. fastigiata | Plantago ovata | Woolly Plantain, Indian Wheat, pastora | |
| Plantago purshii | Plantago patagonica | Plantain, pastora | * |
| Pleuraphis rigida | Hilaria rigida | Big Galleta, galleta grande, tobosa | * |
| Pluchea purpurascens | Pluchea odorata v. odorata | Saltmarsh-fleabane, Alkali Camphor-weed | |
| Plumbago scandens | Plumbago zeylanica | Doctor-bush, estrenina | |
| Polanisia trachysperma | Polanisia dodecandra ssp. Trachysperma | Western Clammyweed | |
| Polypogon semiverticillata | Polypogon viridis | Water Bent Grass, Water Beard Grass | |
| Portulaca lanceolata | Portulaca umbraticola Kunth | Winged Purslane | |
| Portulaca parvula | Portulaca halimoides | Silk-cotton Purslane | |
| Potamageton pectinatus | Stuckenia pectinata | Sago Pondweed | |
| Prosopis juliflora v.torreyana | Prosopis glandulosa var. torreyana | Western Honey Mesquite, mesquite | * |
| Prosopis juliflora v.velutina | Prosopis velutina | Velvet Mesquite, mezquite | * |
| Psilactis coulteri | Leucosyris arizonica (B.L.Turner & D.B.Horne) Pruski & R.L. Hartmann | Psilactis, Arid Tansy-aster | * |
| Quamoclit gracilis | Ipomoea cristulata | Scarlet Morning-glory, Star-glory | |
| Quercus ajoensis | Quercus turbinella | Scrub oak, encinillo | * |
| Quercus turbinella ssp.ajoensis | Quercus turbinella | Scrub oak, encinillo | * |
| Quincula lobata | Quincula lobata (Torrey) Rafinesque | Hairy Ground-cherry | * |
| Rhamnus betulifolia | Frangula betulifolia (Greene) Grubov | Birchleaf Buckthorn, salicieso | |
| Rhamnus ilicifolia | Rhamnus crocea | Holly-leaf Buckthorn, Red-berry Buckthorn | * |
| Rhus trilobata | Rhus aromatica v. trilobata | Skunkbush sumac, limita | * |
| Rhynchosia senna v.angustifolia | Rhynchosia texana | Texas Snout-bean | |
| Rhynchosia senna v.texana | Rhynchosia texana | Texas Snout-bean | |
| Rorippa nasturtium-aquaticum | Nasturtium officinale | Watercress, berro | |
| Rothrockia cordifolia Gray | Matelea cordifolia | Heart-leaf Milkweed Vine | |
| Sairocarpus pusillus | Sairocarpus nuttallianus (Bentham) D.A. Sutton | Lesser Snapdragon | |
| Sairocarpus watsonii | Sairocarpus watsonii (Vasey & Rose) D.A.Sutton | Watsons Snapdragon | |
| Salazaria mexicana | Scutellaria mexicana | Bladder-sage | * |
| Salsola australis | Salsola tragus | Russian thistle, tumbleweed, chamizo volador | * |
| Salsola iberica | Salsola tragus | Russian thistle, tumbleweed, chamizo volador | * |
| Salsola kali | Salsola tragus | Russian thistle, tumbleweed, chamizo volador | * |
| Salsola kali v. tenuifolia | Salsola tragus | Russian thistle, tumbleweed, chamizo volador | * |
| Salsola pestifer | Salsola tragus | Russian thistle, tumbleweed, chamizo volador | * |
| Sambucus cerulea v. mexicana | Sambucus cerulea | Blue Elderberry, tapiro | |
| Sambucus cerulea v. neomexicana | Sambucus cerulea | Blue Elderberry, tapiro | |
| Sambucus mexicana | Sambucus cerulea | Blue Elderberry, tapiro | |
| Sapindus saponaria v.drummondii | Sapindus drummondii | Soapberry, jaboncillo, amolillo | |
| Sapium biloculare | Pleradenophora bilocularis (S.Watson) Esser & A.L.Melo | Arizona Jumping Bean, hierba de la flecha | * |
| Sarcostemma cynanchoides ssp. Hartwegii | Funastrum hartwegii | Climbing milkweed, guirote | * |
| Schismus barbatus ssp.arabicus | Schismus arabicus | Arabian Grass | * |
| Schoenocrambe linearifolia | Hesperidanthus linearifolius | Purple Rock-mustard | |
| Scirpus americanus | Schoenoplectus americanus | Bulrush, tule | |
| Scirpus olneyi | Schoenoplectus americanus | Bulrush, tule | |
| Sebastiania bilocularis S.Watson | Pleradenophora bilocularis (S.Watson) Esser & A.L.Melo | Arizona Jumping Bean, hierba de la flecha | * |
| Selloa glutinosa | Gymnosperma glutinosum | Gumhead | |
| Senecio monoensis | Senecio flaccidus v.monoensis | Sandwash Groundsel, Threadleaf Ragwort | |
| Senecio quercetorum | Packera quercetorum | Oak Creek Ragwort | |
| Sibara virginica (Linnaeus) | Planodes virginicum (Linnaeus) Greene | Winged Rockcress | |
| Sida filicaulis | Sida abutifolia | Spreading Fanpetals | |
| Sida lepidota | Malvella sagittifolia | Arrow-leaf Alkali Mallow | * |
| Sida leprosa | Malvella leprosa | Dollarweed, Alkali Mallow | |
| Sida physocalyx | Rhynchosida physocalyx | Buffpetal, Bladderpod Sida | |
| Sida procumbens | Sida abutifolia | Spreading Fanpetals | |
| Sinapis arvensis | Brassica arvensis | ||
| Sinapis kaber de Candolle Not Sinapis arvensis Linnaeus | Brassica kaber ((de Candolle) L.C.Wheeler | ||
| Siphonoglossa longiflora | Justicia longii | Longflower Tube-tongue | |
| Sisymbrium linearifolium | Hesperidanthus linearifolius | Purple Rock-mustard | |
| Sitanion hystrix | Elymus elymoides | Bottlebush Squirreltail | |
| Solanum nodiflorum | Solanum americanum | Black Nightshade, chichiquelite | |
| Sphaeralcea orcuttii | Sphaeralcea coulteri | Annual Globemallow, mal de ojo | * |
| Sporobolus cryptandrus v.flexuosus | Sporobolus flexuosus | Mesa Dropseed | |
| Sporobolus patens | Sporobolus pyramidatus | Whorled Dropseed | |
| Sporobolus pulvinatus | Sporobolus pyramidatus | Whorled Dropseed | |
| Stanleyella wrightii | Thelypodium wrightii | Wright's Thelypody | * |
| Streptanthus arizonicus v.luteus | Streptanthus carinatus subsp.arizonicus | Arizona Jewel Flower | * |
| Stylocline arizonica | Stylocline gnaphaloides | Everlasting Nestraw | |
| Suaeda moquinii | Suaeda nigra | Desert seepweed, quelite salado, Bush Seepweed | |
| Suaeda torreyana | Suaeda nigra | Desert seepweed, quelite salado, Bush Seepweed | |
| Sympetaleia rupestris | Eucnide rupestris | Velcro Plant, Rock Nettle | |
| Talinum aurantiacum | Phemeranthus aurantiacus | Orange Flame-flower | |
| Tamarix pentandra | Tamarix chinensis | Saltcedar, Tamarisk, salado, pino salado | |
| Tamarix ramosissima | Tamarix chinensis | Saltcedar, Tamarisk, salado, pino salado | |
| Tephrosia tenelia | Tephrosia tenella A. Gray | Red Hoary-pea | |
| Tessaria sericea (Nuttall)Shinners | Pluchea sericea (Nuttall) Coville | Arrow-weed | * |
| Tetraclea coulteri A.Gray | Tetraclea coulteri A. Gray | Coulter's Wrinklefruit | |
| Thelypodiopsis linearifolia | Hesperidanthus linearifolius | Purple Rock-mustard | |
| Thelypodium lasiophyllum | Streptanthus lasiophyllus (Hooker & Arnott) Hoover | Cutleaf Thelypodium, California Mustard | * |
| Thysanocarpus curvipes v.elegans | Thysanocarpus curvipes | Lacepod | * |
| Tidestromia eliassoniana | Tidestromia lanuginosa ssp. Eliassoniana | Woolly Honeysweet, Hierba ceniza, hierba lanuda | |
| Tillaea erecta | Crassula connata | Pigmy-weed, Pygmy Stonecrop | |
| Trichachne californica | Digitaria californica v.californica | Arizona Cottontop, zacate punta blanco | * |
| Trichloris crinita (Lagasca)Parodi | Disakisperma dubium (Kunth) P.M.Peterson & N.Snow | Green Sprangletop | |
| Trichloris crinita (Lagasca) Parodi | Leptocholoa crinita (Lagasca) P.M.Peterson & N.Snow | Feather Finger Grass | |
| Trichloris mendocina | Leptocholoa crinita (Lagasca) P.M.Peterson & N.Snow | Feather Finger Grass | |
| Tridens eragrostoides (Vasey & Scribner) Nash | Tridentopsis eragrostoides (Vasey & Scribner) P.M.Peterson | Lovegrass Tridens | |
| Tridens muticus (Torrey) Nash v. muticus | Tridentopsis mutica (Torrey) P.M. Peterson var. mutica | Slim Tridens | * |
| Tridens pulchellus | Dasyochloa pulchella | Fluff Grass, zacate borreguerro | * |
| Trifolium lacerum | Trifolium wormskioldii | Cow Clover | * |
| Trifolium willdenovii | Trifolium wormskioldii | Cow Clover | * |
| Trifolium wormskjoldii v.arizonicum | Trifolium wormskioldii | Cow Clover | * |
| Triodia pulchella | Dasyochloa pulchella | Fluff Grass, zacate borreguerro | * |
| Verbena bipinnatifida v.ciliata | Glandularia latiloba (L.M.Perry) G.L.Nesom | Prairie Verbena, Dakota Mock Vervain | |
| Verbena ciliata | Glandularia latiloba (L.M.Perry) G.L.Nesom | Prairie Verbena, Dakota Mock Vervain | |
| Verbena gooddingii | Glandularia gooddingii | Goodding's Vervain, Desert Verbena | * |
| Verbena neomexicana v.xylopoda | Verbena xylopoda | Hillside Vervain, Arizona vervain | * |
| Vicia exigua | Vicia ludoviciana | Deerpea Vetch | |
| Viguera.parishii | Bahiopsis parishii | Parish's Goldeneye, ariosa | * |
| Viguera deltoidea | Bahiopsis parishii | Parish's Goldeneye, ariosa | * |
| Viguiera parishii | Bahiopsis parishii | Parish's Goldeneye, ariosa | * |
| Vulpia microstachys | Festuca microstachys | Small Fescue | |
| Vulpia octoflora | Festuca octoflora | Sixweeks Fescue, Eight-flowered Fescue, fescua | * |
| Wilcoxia diguetii | Peniocereus striatus | sacamtraca, sarramatraca | * |
| Wilcoxia striata | Peniocereus striatus | sacamtraca, sarramatraca | * |
| Yucca arizonica | Yucca baccata v.brevifolia | Banana Yucca, datil | * |
| Zauschneria californica ssp.latifolia | Epilobium canum ssp.latifolium | California Fuchsia, Hummingbird Trumpet | |
| Zephyranthes longifolia Hemsley | Habranthus longifolius (Hemsley) Flagg, G.Lom, Smith & Meerow | Plains Rain-lily |
*Species page has photo(s).