Indian Ricegrass
Stipa hymenoides
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Lemmon's Needlegrass
Stipa lemmonii
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Foothill Needlegrass
Stipa lepida
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Columbia Needlegrass
Stipa nelsonii
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Dore's Needlegrass
Stipa nelsonii var. dorei
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Western Needlegrass
Stipa occidentalis
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Western Needlegrass
Stipa occidentalis var. occidentalis
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Purple Needlegrass
Stipa pulchra
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Desert Stipa
Stipa speciosa
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Thurber's Needlegrass
Stipa thurberiana
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Farnsworth's Jewel Flower
Streptanthus farnsworthianus
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Metcalf Canyon Jewelflower
Streptanthus glandulosus
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Most Beautiful Jewel Flower
Streptanthus glandulosus ssp. glandulosus
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Hoffmann's Jewelflower
Streptanthus glandulosus ssp. hoffmanii
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Secund Jewelflower
Streptanthus glandulosus ssp. secundus
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San Benito Jewelflower
Streptanthus insignis
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Streptopus amplexifolius var. americanus
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Pondweed
Stuckenia pectinata
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Leafcover Saltweed
Stutzia covillei
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California Snowdrop
Styrax redivivus
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Bush Seepweed
Suaeda nigra
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Seablite
Suaeda taxifolia
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Fragrant Snowberry
Symphoricarpos longiflorus
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Roundleaf Snowberry
Symphoricarpos rotundifolius
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Mountain Snowberry
Symphoricarpos rotundifolius var. rotundifolius
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California Aster
Symphyotrichum chilense
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Dwarf Coast Aster
Symphyotrichum chilense 'Dwarf'
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Point St George Aster
Symphyotrichum chilense 'Point Saint George'
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Purple Haze Coast Aster
Symphyotrichum chilense 'Purple Haze'
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Leafy Aster
Symphyotrichum foliaceum
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Parry's Leafy Aster
Symphyotrichum foliaceum var. apricum
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Western Mountain Aster
Symphyotrichum spathulatum
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Dune Tansy
Tanacetum bipinnatum
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Sun Cup
Taraxia ovata
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Southern Tauschia
Tauschia arguta
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Tauschia
Tauschia hartwegii
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Cotton Catclaw
Tetradymia axillaris
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Spineless Horsebrush
Tetradymia canescens
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Hairy Horsebrush
Tetradymia comosa
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Shortspine Horsebrush
Tetradymia spinosa
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Stemless Four Nerve Daisy
Tetraneuris acaulis
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Turpentinebroom
Thamnosma montana
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Nevada Marsh Fern
Thelypteris nevadensis
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Showy Maiden Fern
Thelypteris puberula
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Sonoran Maiden Fern
Thelypteris puberula var. sonorensis
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Slender Falselupine
Thermopsis gracilis
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Common False Lupine
Thermopsis macrophylla
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Western Red Cedar
Thuja plicata
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Fiveneedle Pricklyleaf
Thymophylla pentachaeta
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Hairy Lacepod
Thysanocarpus curvipes
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Narrowleaf Fringe Pod
Thysanocarpus laciniatus
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Western Poison Oak
Toxicodendron diversilobum
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Chaparral Zygadene
Toxicoscordion fremontii
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Panicled Death Camas
Toxicoscordion paniculatum
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Woolly Bluecurls
Trichostema lanatum
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Vinegarweed
Trichostema lanceolatum
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Parish's Bluecurls
Trichostema parishii
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Indian Clover
Trifolium albopurpureum
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Pinole Clover
Trifolium bifidum
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Pinole Clover
Trifolium bifidum var. bifidum