Spanish Bayonet
Spanish Iris
Spanish Lavender
Sparaxis, Harlequin Flower
Sparkler Freeway Daisy
Spathe Leaved Sedum
Spear Lily
Species Rose
Spice Bush
Spider Flower
Spike Gayfeather, Blazing Star
Spineless Yucca
Spiny Rush
Spreading Acacia
Spreading English Yew
Sprenger Asparagus
Squirrel's Foot Fern
St. Catherine's Lace
St. Vincent Rockrose
Stalked Aeonium