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Cinquefoil False Sagebrush

Sphaeromeria potentilloides

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Alkali Tansy-sage

Sphaeromeria potentilloides var. nitrophila

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Cinquefoil Tansy

Sphaeromeria potentilloides var. potentilloides

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Prairie Wedge Grass

Sphenopholis obtusata

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Douglas's Spirea

Spiraea douglasii

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Meadow Sweet

Spiraea splendens

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Creamy Lady's Tresses

Spiranthes porrifolia

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Irish Lady's-tresses

Spiranthes romanzoffiana

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Common Duckmeat

Spirodela polyrhiza

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Alkali Sacaton

Sporobolus airoides

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Spike Dropseed

Sporobolus contractus

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Sand Dropseed

Sporobolus cryptandrus

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Mesa Dropseed

Sporobolus flexuosus

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California Cord Grass

Sporobolus foliosus

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Alkali Cord Grass

Sporobolus hookerianus

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Big Sacaton

Sporobolus wrightii

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Ajuga Hedge Nettle

Stachys ajugoides

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White Hedge Nettle

Stachys albens

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Berg's Hedgenettle

Stachys bergii

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California Hedgenettle

Stachys bullata

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Rocky Point Hedge Nettle

Stachys bullata 'Rocky Point'

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Coastal Hedgenettle

Stachys chamissonis

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Mexican Hedgenettle

Stachys mexicana

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Marsh Hedgenettle

Stachys palustris

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Prairie Woundwort

Stachys pilosa

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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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Santa Cruz Microseris

Stebbinsoseris decipiens

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Grassland Silverpuffs

Stebbinsoseris heterocarpa

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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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Umbellate Starwort

Stellaria umbellata

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Purple Stemodia

Stemodia durantifolia

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Western Featherbells

Stenanthium occidentale

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Stemless Mock Goldenweed

Stenotus acaulis

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Woolly Mock Goldenweed

Stenotus lanuginosus

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Woolly Stenotus

Stenotus lanuginosus var. lanuginosus

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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

Calscape.org

Deane's Wirelettuce

Stephanomeria exigua ssp. deanei