Sparaxis, Harlequin Flower
Spathe Leaved Sedum
Spear Lily
Spice Bush
Spider Flower
Spike Gayfeather
Spineless Yucca
Spiny Rush
Spoon-Yucca
Spreading Acacia
Spreading English Yew
Sprenger Asparagus
Squirrel's Foot Fern
St. Catherine's Lace
Stalked Aeonium
Star Jasmine
Star Magnolia
Sticks on Fire Pencil Tree
Sticky Monkey Flower