| Common Name | Scientific Name |
|
Saltgrass
|
Distichlis spicata
|
|
San Fernando Valley spineflower
|
Chorizanthe parryi var. fernandina
|
|
San Luis mariposa lily
|
Calochortus obispoensis
|
|
San Luis Obispo dudleya
|
Dudleya abramsii ssp. murina
|
|
San Miguel Island buckwheat
|
Eriogonum grande var. rubescens
|
|
Sand aster
|
Lessingia filaginifolia
|
|
Sand mat
|
Cardionema ramosissima
|
|
Sand mesa manzanita
|
Arctostaphylos rudis
|
|
Sand spurrey
|
Spergularia macrotheca
|
|
Sandwort
|
Minuartia douglasii
|
|
Santa Monica Mountains dudleya
|
Dudleya cymosa ssp. marcescens
|
|
Santa Susana tarplant
|
Hemizonia minthornii
|
|
Saw-toothed goldenbush
|
Hazardia squarrosa
|
|
Scarlet bugler
|
Penstemon centranthifolius
|
|
Scarlet larkspur
|
Delphinium cardinale
|
|
Scarlet monkey flower
|
Mimulus cardinalis
|
|
Sclerapoa
|
Desmazeria rigida
|
|
Scrub oak
|
Quercus berberidifolia
|
|
Sea dahlia
|
Coreopsis maritima
|
|
Sea fig
|
Carpobrotus chilensis
|
|
Sea rocket
|
Cakile edentula
|
|
Seaside daisy
|
Erigeron glaucus
|
|
Seaside painted cup
|
Castilleja latifolia
|
|
Seaside woolly sunflower
|
Eriophyllum staechadifolium
|
|
Sedge
|
Carex aquatilis
|
|
Setaria
|
Setaria viridis
|
|
Shaw's agave
|
Agave shawii
|
|
Sheep sorrel
|
Rumex acetosella
|
|
Shepherd's purse
|
Capsella bursa-pastoris
|
|
Shiny leaf barberry
|
Berberis pinnata
|
|
Shiny lomatium
|
Lomatium lucidum
|
|
Shooting star
|
Dodecatheon clevelandii
|
|
Showy gilia
|
Gilia cana
|
|
Showy island snapdragon
|
Galvezia speciosa
|
|
Showy penstemon
|
Penstemon spectabilis
|
|
Shredding evening primrose
|
Camissonia boothii ssp. decorticans
|
|
Silk tassel bush
|
Garrya veatchii
|
|
Silver lotus
|
Lotus argophyllus
|
|
Silver puffs
|
Uropappus lindleyi
|
|
Silverweed
|
Potentilla anserina ssp. pacifica
|
|
Six-weeks fescue
|
Vulpia octoflora
|
|
Skullcap
|
Scutellaria tuberosa
|
|
Slender cottonweed
|
Micropus californicus
|
|
Slender sunflower
|
Helianthus gracilentus
|
|
Slender tarweed
|
Madia gracilis
|
|
Small primrose
|
Camissonia micrantha
|
|
Small-flowered fairypoppy
|
Meconella denticulata
|
|
Small-leaved lomatium
|
Lomatium parvifolium
|
|
Small-leaved rose
|
Rosa minutifolia
|
|
Smilo grass
|
Oryzopsis miliacea
|
|
Snakeroot
|
Sanicula arguta
|
|
Sneezeweed
|
Helenium puberulum
|
|
Snowy thistle
|
Cirsium occidentale var. candidissimum
|
|
Soap lily
|
Chlorogalum pomeridianum
|
|
Soap plant
|
Chenopodium californicum
|
|
Soft chess
|
Bromus mollis
|
|
Southern California milkvetch
|
Astragalus trichopodus var. lonchus
|
|
Southern sun cup
|
Camissonia bistorta
|
|
Sow thistle
|
Sonchus oleraceus
|
|
Spanish broom
|
Spartium junceum
|
|
Spanish clover
|
Lotus purshianus
|
|
Spearmint
|
Menthis spicata
|
|
Spearscale
|
Atriplex triangularis
|
|
Spider lupine
|
Lupinus benthamii
|
|
Spike rush
|
Eleocharis acicularis
|
|
Spiny rush
|
Juncus acutus var. sphaerocarpus
|
|
Splendid mariposa lily
|
Calochortus splendens
|
|
Spotted spurge
|
Chamaesyce maculata
|
|
Spreading larkspur
|
Delphinium patens
|
|
Squaw bush
|
Rhus trilobata
|
|
Squirreltail
|
Elymus elymoides
|
|
St. Catherine's lace
|
Eriogonum giganteum
|
|
Star thistle
|
Centaurea melitensis
|
|
Star-lily
|
Zigadenus fremontii
|
|
Stick-leaf
|
Mentzelia micrantha
|
|
Sticky phacelia
|
Hydrophyllaceae
|
|
Sticky potentilla
|
Potentilla glandulosa
|
|
Stinging lupine
|
Lupinus hirsutissimus
|
|
Stinging nettle
|
Urtica dioica ssp. holosericea
|
|
Stone-crop
|
Sedum spathulifolium
|
|
Strawberry clover
|
Trifolium fragiferum
|
|
Stream orchid
|
Epipactis gigantea
|
|
Sugar bush
|
Rhus ovata
|
|
Summer holly
|
Comarostaphylis diversifolia
|
|
Sun cup
|
Camissonia ovata
|
|
Sunflower
|
Helianthus annuus
|
|
Swamp knotweed
|
Polygonum amphibium var. emersum
|
|
Sweet acacia
|
Acacia farnesiana var. farnesiana
|
|
Sweet alyssum
|
Lobularia maritima
|
|
Sweet fennel
|
Foeniculum vulgare
|
