| § Ratibida
columnifera |
Mexican Hat, Coneflower |
| § Rhus
lanceolata |
Lanceleaf Sumac |
| § Rhus
microphylla |
Littleleaf Sumac, Squawberry |
| § Rhus
trilobata |
Aromatic Sumac, Limitas |
| § Rhus virens
var. choriophylla |
Evergreen Sumac |
| § Ribes
aureum |
Golden Current |
| § Rivina
humilis |
Rouge Plant, Pigeon Berry |
| § Rumex
hymenosepalus |
Dock, Sorrel, Canaigre |
| § Salazaria
mexicana |
Bladder Sage |
| § Salix
exigua |
Coyote Willow |
| Salix gooddingii |
Goodding Willow |
| § Salvia
chamaedryoides |
Mexican Blue Sage |
| § Salvia
farinacea |
Mealy Cup Sage, "Texas Violet" |
| § Salvia
greggii |
Cherry Sage, Autumn Sage |
| § Salvia
leptophylla |
Slenderleaf Sage |
| § Salvia
lycioides |
Blue Canyon Sage |
| § Salvia
microphylla |
Red Canyon Sage |
| § Salvia
penstemonoides |
Big Red Sage |
| § Salvia
pinguifolia |
Rock Sage |
| § Salvia
regla |
Mountain Sage |
| § Salvia
roemeriana |
Cedar Sage |
| Salvia spathecifolia |
Tarahumara Sage |
| § Salvia
summa |
Summa Sage |
| § Sapindus
saponaria var. drummondi |
Western Soapberry, Jaboncillo |
| § Sarcostemma
cynanchoides |
Twining Milkweed |
| § Schaefferia
cuneifolia |
Desert Yaupon, Capul, Panalero |
| § Sclerocactus
intertexta |
White Fishook Cactus |
| § Sclerocactus
uncinatus |
Chihuahuan Fishook Cactus |
| § Scutellaria
suffrutescens |
Red Skullcap |
| § Scutellaria wrightii |
Blue Skullcap |
| § Selaginella
lepidophylla |
Resurrection Plant |
| § Selaginella
sp. |
Resurrection Plant |
|
|
| Selinocarpus diffusus |
Moonpod |
| § Senecio
flaccidus |
Threadleaf Groundsel, Gordolobos |
| § Senecio
riddellii |
Sand Groundsel |
| § Senegalia berlandieri |
Guajillo |
| § Senegalia crassifolia |
Bauhinia-leaf Acacia |
| § Senegalia
greggii |
Catclaw Acacia, Uña De Gato |
| § Senegalia
roemeriana |
Roemer's Acacia |
| § Senna
bauhinioides |
Twinleaf Cassia |
| § Senna
lindheimeriana |
Velvetleaf Cassia |
| § Senna
roemeriana |
Twoleaf Cassia |
| § Senna
wislizenii |
Shrubby Senna |
| § Sida
abutifolia |
Spreading Fanpetals |
| § Silene
laciniata |
Mexican Campion |
| § Solanum
elaeagnifolium |
Silverleaf Nightshade |
| § Solanum
rostratum |
Buffalobur Nightshade |
| § Sophora
secundiflora |
Texas Mountain Laurel, Mescal Bean |
| § Sphaeralcea
angustifolia |
Narrowleaf Globemallow |
| § Sphaeralcea coccinea |
Globe Mallow |
| § Sphaeralcea
digitata |
Juniper Globemallow |
| § Sphaeralcea
fendleri |
Fendler's Globemallow |
| § Sphaeralcea
incana |
Gray Globe Mallow |
| Sporobolus
airoides |
Alkali Sacaton |
| § Sporobolus
cryptandrus |
Sand Dropseed |
| § Sporobolus
wrightii |
Giant Sacaton |
| § Stachys
coccinea |
Scarlet Hedgenettle |
| § Stanleya
pinnata |
Prince's Plume |
| Stipa tenuissima |
Needle Grass |
| § Streptanthus
carinatus |
Lyreleaf Jewelflower |
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