Sophora, Hairy Sophora, Texas
'Soquel' Coast Redwood 'Soraya' Common Sunflower
Sorrel Tree Sorrel, Four Leaf
Sotol Sotol, Common
Sotol, Narrow-Leaf Sour Gum (spp.)
Sour Gum 'Dirr Selection' Sourwood
South Florida Slash Pine Southern Arrowwood (spp.)
Southern Balsam Fir Southern Bayberry
'Southern Belle' Rose Mallow Southern Blackhaw (spp.)
Southern Blackhaw 'Emerald Charm™' Southern Blue Flag 'Purple Fan'
Southern Bush Honeysuckle 'Butterfly' Southern Catalpa (spp.)
Southern Catalpa Dwarf Southern Catalpa Golden
Southern Crabapple Southern Fox Grape
Southern Hawthorn 'Winter King' Southern Live Oak (spp.)
Southern Live Oak 'Cathedral Oak™ (Shadowlawn)' Southern Live Oak 'Heritage'
Southern Live Oak 'Highrise' Southern Live Oak 'Millenaire Live Oak™'
Southern Magnolia (spp.) Southern Magnolia 'Alta®'
Southern Magnolia 'Altius™' Southern Magnolia 'Baby Doll'
Southern Magnolia 'Bracken's Brown Beauty' Southern Magnolia 'Claudia Wannamaker'
Southern Magnolia 'D.D. Blanchard' Southern Magnolia 'Dearing Street'
Southern Magnolia 'Edith Bogue' Southern Magnolia 'Exmouth'
Southern Magnolia 'Exonensis' Southern Magnolia 'Hasse'
Southern Magnolia 'Little Gem' Southern Magnolia 'Miss Chloe®'
Southern Magnolia 'Phyllis Barrow' Southern Magnolia 'Plantation'
Southern Magnolia 'Russet' Southern Magnolia 'Saint Mary'
Southern Magnolia 'Samuel Sommer' Southern Magnolia 'Satinleaf'
Southern Magnolia 'Select III' Southern Magnolia 'Symmes'
Southern Magnolia 'Victoria' Southern Pine
Southern Prickly Ash Southern Red Oak
Southern Shagbark Southern Sundrops
Southern White Cedar (spp.) Southern White Cedar 'Andelyensis'
Southern White Cedar 'Conica' Southern White Cedar 'Ericoides'
Southern White Cedar 'Heatherbun' Southern Wood Fern
Southern Wood Fern: normalis Southern Woodland Penstemon
Southwestern Cosmos (spp.) Southwestern Cosmos 'Early Wonder'
Southwestern Cosmos 'Sonata White' Southwestern White Pine
Spanglegrass Spanglegrass River Oats
Spanish Bayonet (spp.) Spanish Bayonet 'Marginata'
Spanish Bayonet Variegated Spanish Dagger (spp.)
Spanish Dagger (spp.) Spanish Dagger 'Marginata'
Spanish Dagger Variegated Spanish Dagger Variegated
Spanish Flag (spp.) Spanish Flag 'Citronella'
Spanish Moss Spanish Needle 'Golden Goddess'
Spanish Oak: falcata Spanish Oak: texana
Spanish Stopper Spanish Yucca
Sparkleberry Spatterdock
Spear Grass: tenuissima Spearleaf Stonecrop
Speckled Wood Lily Spice, Bush
Spice, Bush Northern Spicebush, Western
Spicewood