Sacramento Burbark
Sadleria
Sage
Sagebrush
Sago Pondweed
Salsify
Salt Heliotrope
Saltbush
Saltgrass
Sanchezia
Sandalwood
Sandbur
Sanddune Sandbur
Sandmallow
Sandmat
Sandwich Beach Strawberry
Sandwort
Sanguinaria
Sanicle
Santa Cruz Island Hollyfern
Santa Maria Feverfew
Satinleaf
Sauvagesia
Sawgrass
Sawsedge
Sawtooth Blackberry
Sawtooth Logwood
Scaleseed
Scaly Swordfern
Scarlet Pimpernel
Scarlet Spiderling
Scarlet Spiral-ginger
Scarlet Tasselflower
Scarletcreeper
Scarletfruit Passionflower
Schefflera
Schiedea
Schlumbergera
Scorpionbush
Scotch Attorney
Scotch Broom
Scrambling Fern
Screwpine
Sea Hibiscus