Schismatoglottis calyptrata
Dukaruk
Scleroderma aerolatum
Leopard Earthball
Scrophularia umbrosa
Green Figwort
Scutellaria galericulata
Skullcap
Sedum album
White Stonecrop
Seemannia sylvatica
Bolivian Sunset
Selaginella martensii
Variegated Spikemoss
Selaginella willdenowii
Willdenow's Spikemoss
Selenicereus undatus
Pitahaya
Senecio sarracenicus
Broad-leaved Ragwort
Senecio vernalis
Eastern Groundsel
Senega paniculata
Root Beer Plant
Senna alata
Emperor's Candlesticks
Senna fistula
Golden Shower Tree
Senna obtusifolia
Sicklepod
Sequoiadendron giganteum
Wellingtonia
Seseli libanotis
Moon Carrot
Setaria verticillata
Hooked Bristlegrass
Setaria viridis
Green Bristle-grass
Sicyos edulis
Chayote
Sida acuta
Common Wireweed
Sida rhombifolia
Arrowleaf Sida
Silene conica
Sand Catchfly
Silene flos-cuculi
Ragged-Robin