Short Spike Hedge Nettle
Stachys pycnantha
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Rough Hedgenettle
Stachys rigida
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Rough Hedgenettle
Stachys rigida var. quercetorum
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Rigid Hedge Nettle
Stachys rigida var. rigida
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Stebbins' Hedgenettle
Stachys stebbinsii
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Sonoma Hedgenettle
Stachys stricta
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Panamint Princesplume
Stanleya elata
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Prince's Plume
Stanleya pinnata
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Desert Princesplume
Stanleya pinnata var. pinnata
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Green-flowered Prince's Plume
Stanleya viridiflora
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Sierra Bladdernut
Staphylea bolanderi
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Boreal Starwort
Stellaria borealis
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Sitka Starwort
Stellaria borealis ssp. sitchana
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Northern Starwort
Stellaria calycantha
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Crisp Starwort
Stellaria crispa
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Beach Starwort
Stellaria littoralis
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Long-leaved Starwort
Stellaria longifolia
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Longstalk Starwort
Stellaria longipes
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Goldie's Starwort
Stellaria longipes ssp. longipes
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Shining Chickweed
Stellaria nitens
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Obtuse Starwort
Stellaria obtusa
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Umbellate Starwort
Stellaria umbellata
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Purple Stemodia
Stemodia durantifolia
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Chicory Leaved Stephanomeria
Stephanomeria cichoriacea
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San Diego Wirelettuce
Stephanomeria diegensis
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Santa Barbara Wirelettuce
Stephanomeria elata
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Small Wirelettuce
Stephanomeria exigua
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Whiteplume Wirelettuce
Stephanomeria exigua ssp. carotifera
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Whiteplume Wirelettuce
Stephanomeria exigua ssp. coronaria
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Deane's Wirelettuce
Stephanomeria exigua ssp. deanei
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Small Wirelettuce
Stephanomeria exigua ssp. exigua
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Whiteplume Wirelettuce
Stephanomeria exigua ssp. macrocarpa
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Lettuce Wirelettuce
Stephanomeria lactucina
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Tufted Wirelettuce
Stephanomeria paniculata
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Parry's Rock Pink
Stephanomeria parryi
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Parish's Wire Lettuce
Stephanomeria pauciflora
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Narrow-leaved Wire-lettuce
Stephanomeria tenuifolia
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Rod Wirelettuce
Stephanomeria virgata
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Wand Wirelettuce
Stephanomeria virgata ssp. pleurocarpa
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Rod Wirelettuce
Stephanomeria virgata ssp. virgata
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Queen's-root
Stillingia linearifolia
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Annual Toothleaf
Stillingia spinulosa
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Mormon Needle Grass
Stipa arida
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Nodding Needle Grass
Stipa cernua
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Needlegrass
Stipa comata
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Needle & Thread Grass
Stipa comata var. comata
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Stipa comata var. intermedia
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Giant Stipa
Stipa coronata
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San Diego County Needle Grass
Stipa diegoensis
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Small-flowered Rice Grass
Stipa divaricata
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Indian Ricegrass
Stipa hymenoides
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King's Rice Grass
Stipa kingii
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Wide-glumed Needle Grass
Stipa latiglumis
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Lemmon's Needlegrass
Stipa lemmonii
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Stipa lemmonii var. lemmonii
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Pubescent Lemmon's Needlegrass
Stipa lemmonii var. pubescens
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Foothill Needlegrass
Stipa lepida
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Letterman's Needlegrass
Stipa lettermanii
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Columbia Needlegrass
Stipa nelsonii
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Dore's Needlegrass
Stipa nelsonii var. dorei