| Sphaeralcea grossulariifolia |
Gooseberryleaf Globemallow |
No |
| Sphaeralcea munroana |
Munro's Globemallow |
Yes |
| Sphaeralcea sulphurea |
Guadalupe Island Globemallow bush |
Yes |
| Spiraea douglasii |
Rose Spirea |
Yes |
| Spiraea splendens |
Rose Meadowsweet |
Yes |
| Sporobolus airoides |
Sacaton |
Yes |
| Stachys albens |
White Hedgenettle |
Yes |
| Stachys bullata |
Hedgenettle |
Yes |
| Stachys chamissonis |
Coastal Hedgenettle |
Yes |
| Stachys stebbinsii |
Stebbins' Hedgenettle |
Yes |
| Stanleya pinnata |
Prince's Plume |
No |
| Stipa cernua |
Nodding needle grass |
Yes |
| Stipa lemmonii |
Lemmon's Needle Grass |
Yes |
| Stipa lepida |
Foothill needle grass |
No |
| Stipa pulchra |
Purple needle grass |
Yes |
| Streptanthus polygaloides |
Milkwort jewelflower |
No |
| Strombocarpa pubescens |
Screwbean Mesquite |
Yes |
| Styrax redivivus |
Snow Drop Bush |
Yes |
| Symphoricarpos albus |
snowberry |
Yes |
| Symphoricarpos albus ‘Tilden Park’ |
'Tilden Park' snowberry |
Yes |
| Symphoricarpos mollis |
Creeping snowberry |
Yes |
| Symphyotrichum ascendens |
Western Aster |
Yes |
| Symphyotrichum chilense ‘Purple Haze’ |
'Puple Haze' California aster |
Yes |
| Symphyotrichum chilensis ‘Pt. St. George’ |
'Pt. St. George' California aster |
No |
| Tanacetum bipinnatum |
Dune Tansy |
Yes |
| Tellima grandiflora |
Fringe Cups |
No |
| Tetraneuris acaulis |
Angelita Daisy |
Yes |
| Teucrium glandulosum |
Desert Gemander |
Yes |
| Thalictrum fendleri var. polycarpum |
Meadow Rue |
Yes |
| Thalictrum fendleri var. polycarpum Female Plant |
Meadow Rue Female Plant |
Yes |
| Thalictrum fendleri var. polycarpum Male Plant |
Meadow Rue Male Plant |
Yes |
| Thelypteris puberula var. sonorensis |
Sonoran Maiden Fern |
No |
| Thuja plicata |
Western Red Cedar |
Yes |
| Thymophylla pentachaeta |
Fiveneedle pricklyleaf |
No |
| Tiarella trifoliata |
Sugar Scoop |
No |
| Tolmiea menziesii |
Piggyback Plant |
No |
| Torreya californica |
California nutmeg |
Yes |
| Toxicoscordion fremontii |
Fremont's star lily |
Yes |
| Toxicoscordion paniculatum |
Foothill Death Camas |
Yes |
| Trichostema lanatum |
Woolly Blue Curls |
Yes |
| Trichostema lanatum X purpusii |
Hybrid Woolly Blue Curls |
Yes |
| Trichostema lanatum X purpusii ‘Midnight Magic’ |
Hybrid Woolly Blue Curls Midnight Magic |
Yes |
| Trillium albidum |
White Trillium |
Yes |
| Triteleia hyacinthina |
White Brodiaea |
Yes |
| Triteleia ixioides |
Pretty face |
No |
| Triteleia laxa |
Ithuriel's Spear |
Yes |
| Triteleia laxa ‘Queen Fabiola’ |
'Queen Fabiola' Ithuriel's Spear |
Yes |
| Triteleia laxa ‘Rudy’ |
'Rudy' Ithuriel's Spear |
No |
| Triteleia laxa ‘Silver Queen’ |
'Silver Queen' Ithuriel's Spear |
Yes |
| Triteleia peduncularis |
Long Rayed Brodiaea |
No |