Spider Flower
Spike Gayfeather
Spineless Yucca
Spiny Rush
Spoon-Yucca
Spreading Acacia
Sprenger Asparagus
St. Catherine's Lace
Stalked Aeonium
Star Jasmine
Star Magnolia
Sticks on Fire Pencil Tree
Sticky Monkey Flower
Stock
Stratavarus Daffodil
Strawberry Guava
Strawberry Madrone
Strawberry Tree
Streamside Monkey Flower