S

Salsola tragus* (Russian thistle)
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Salvia apiana (White sage)
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Salvia columbariae (Chia)
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Salvia leucophylla (Purple sage)
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Salvia mellifera (Black sage)
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Salvia spathacea (Crimson pitcher sage or Hummingbird sage)
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Sambucus mexicana (Mexican elderberry)
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Sanicula arguta (Snakeroot)
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Sanicula crassicaulis (Pacific sanicle)
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Saxifraga californica (California saxifrage)
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Scrophularia californica (Coast figwort)
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Scutellaria tuberosa (Skullcap)
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Senecio flaccidus (Shrubby butterweed or Bush senecio)
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Senecio vulgaris* (Common groundsel)
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Sidalcea malvaeflora (Checker bloom)
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Silene gallica* (Windmill pink)
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Silene laciniata (Indian pink)
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Silybum marianum* (Milk thistle)
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Sisymbrium officinale* (Hedge mustard)
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Sisyrinchium bellum (Blue-eyed grass)
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Solanum douglasii (White nightshade)
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Solanum xanti (Purple nightshade)
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Solidago californica (California goldenrod)
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Sonchus asper* (Prickly sow thistle)
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Sonchus oleraceus* (Sow thistle)
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Spartium junceum (Spanish broom)
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Stachys bullata (Hedge nettle)
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Stellaria media* (Chickweed)
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Stephanomeria cichoriacea (Chicory-leaved stephanomeria or Tejon milk-aster)
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Stephanomeria virgata (Tall stephanomeria or Wand chicory)
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Stylomecon heterophylla (Wind poppy)
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Symphoricarpos mollis (Snowberry)
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