S-curve Threeawn
Sacred Lotus
Sacred Thorn-apple
Sage
Sagebrush
Sago Pondweed
Sainfoin
Salsify
Salt Heliotrope
Saltbush
Saltgrass
Saltmeadow Rush
Sand Bittercress
Sand Dropseed
Sand Grape
Sand Hickory
Sand Lovegrass
Sand Plantain
Sand Violet
Sandbar Lovegrass
Sandbar Willow
Sandbur
Sanddune Wallflower
Sandgrass
Sandhill Amaranth
Sandmat
Sandparsley
Sandreed
Sandspurry
Sandwort
Sandyseed Clammyweed
Sanicle
Santa Maria Feverfew
Sassafras
Satincurls
Saururus
Saw Greenbrier
Sawgrass
Sawtooth Blackberry
Sawtooth Sunflower
Sawtooth Wormwood
Saxifrage
Scaldweed
Scaleseed