Cape Blanco Common Stonecrop
Sedum spathulifolium 'Cape Blanco'
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Purpureum Common Stonecrop
Sedum spathulifolium 'Purpureum'
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Tomales Bay Common Stonecrop
Sedum spathulifolium 'Tomales Bay'
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Red Raver Yosemite Stonecrop
Sedum spathulifolium ssp. yosemitense 'Red Raver'
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Wormleaf Stonecrop
Sedum stenopetalum
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Bluish Spike-moss
Selaginella asprella
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Spike Moss
Selaginella bigelovii
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Ashy Spike-moss
Selaginella cinerascens
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Desert Spike-moss
Selaginella eremophila
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Hansen's Spikemoss
Selaginella hansenii
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Mojave Spike-moss
Selaginella leucobryoides
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Oregon Spikemoss
Selaginella oregana
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Rocky Mountain Spike-moss
Selaginella scopulorum
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Wallace Moss Fern
Selaginella wallacei
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Watson's Spikemoss
Selaginella watsonii
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Chaparral Ragwort
Senecio aphanactis
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Rayless Ragwort
Senecio aronicoides
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San Gabriel Ragwort
Senecio astephanus
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Dune Ragwort
Senecio blochmaniae
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California Ragwort
Senecio californicus
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Clark's Ragwort
Senecio clarkianus
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Threadleaf Ragwort
Senecio flaccidus
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Douglas' Groundsel
Senecio flaccidus var. douglasii
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Smooth Threadleaf Ragwort
Senecio flaccidus var. monoensis
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Dwarf Mountain Ragwort
Senecio fremontii
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Dwarf Mountain Ragwort
Senecio fremontii var. fremontii
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Western Dwarf Mountain Ragwort
Senecio fremontii var. occidentalis
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Sweet Marsh Ragwort
Senecio hydrophiloides
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Water Groundsel
Senecio hydrophilus
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Lambstongue Ragwort
Senecio integerrimus
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Columbia Ragwort
Senecio integerrimus var. exaltatus
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Lambs-tongue Ragwort
Senecio integerrimus var. major
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Pale-yellow Ragwort
Senecio integerrimus var. ochroleucus
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Island Senecio
Senecio lyonii
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Mojave Ragwort
Senecio mohavensis
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Mount Patterson Senecio
Senecio pattersonensis
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Sierra Ragwort
Senecio scorzonella
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Tall Ragwort
Senecio serra
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Tall Ragwort
Senecio serra var. serra
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Broom-like Ragwort
Senecio spartioides
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Arrowhead Butterweed
Senecio triangularis
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Catclaw
Senegalia greggii
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Spiny Senna
Senna armata
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Coves' Cassia
Senna covesii
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Coast Redwood
Sequoia sempervirens
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Adpressa Redwood
Sequoia sempervirens 'Adpressa'
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Aptos Blue Redwood
Sequoia sempervirens 'Aptos Blue'
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Nana Pendula Redwood
Sequoia sempervirens 'Nana Pendula'
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Santa Cruz Redwood
Sequoia sempervirens 'Santa Cruz'
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Soquel Redwood
Sequoia sempervirens 'Soquel'
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Sierra Redwood
Sequoiadendron giganteum
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Oregon Whitetop Aster
Sericocarpus oregonensis
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Oregon Whitetop Aster
Sericocarpus oregonensis ssp. californicus
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Oregon Whitetop Aster
Sericocarpus oregonensis ssp. oregonensis
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Bigpod Sesbania
Sesbania herbacea
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Western Sea-purslane
Sesuvium verrucosum
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Knotroot Bristle Grass
Setaria parviflora
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Silver Buffaloberry
Shepherdia argentea
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Russet Buffaloberry
Shepherdia canadensis
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Desert Winged Rockcress
Sibara deserti