Shrub Roses
Shrubby Senna
Sideoats Grama
Silk Tree, Mimosa Tree
Silver Cloud Silverleaf
Silver Dollar Gum
Silver King Artemisia, Western Mug
Silver Leaf Cassia
Silver Leaf Senna
Silver Maple, Soft or White Maple
Silver Top Gimlet
Skeleton-Leaf Goldeneye
Slipper Flower
Small Soapweed
Smoketree, Wigtree
Smooth Agave
Smoothbark Arizona Cypress
Soap Aloe
Soapberry
Soaptree Yucca