'Swing' Florist's Chrysanthemum Swiss Chard 'Bright Lights'
Swiss Cheese Plant 'Swiss' Peppermint
Swiss Pine (spp.) Swiss Pine Dwarf
Swiss Pine 'Pygmaea' Swiss Stone Pine (spp.)
Swiss Stone Pine Dwarf Swiss Stone Pine 'Pygmaea'
Switch Grass (spp.) Switch Grass 'Dallas Blues'
Switch Grass 'Haense Hermes' Switch Grass 'Heavy Metal'
Switch Grass 'Rotstrahlbusch' 'Switzerland' Shasta Daisy
'Swizzle Cherry and Ivory' Common Zinnia 'Swizzle Scarlet and Yellow' Common Zinnia
Sword Fern (spp.) Sword Fern 'Furcans'
Sword Fern: exaltata (spp.) Sword Fern: exaltata 'Bostoniensis'
Sword Fern: exaltata 'Crispa' Sword Fern: exaltata 'Dallas'
Sword Fern: exaltata 'Fluffy Ruffles' Sword Fern: exaltata Golden
Sword Fern: exaltata 'Kimberly Queen' Sword Fern: exaltata 'Portor's Rossevelt'
Sword Fern: laurifolia Sword Lily 'Easter Parade'
Sword Lily 'Flevo Junior' Sword Lily 'Lemon Meringue'
Sword Lily 'Midnight Moonlight' Sword Lily 'Purple Flame'
Sword Lily: hortulanushybrid Sword Plant Bromeliad
Swordfish Banksia Sycamore Maple (spp.)
Sycamore Maple 'Brilliantissimum' Sycamore Maple 'Eskimo Sunset'
Sycamore Maple 'Prinz Handjeryi' Sycamore Maple 'Purpureum'
Sycamore Maple 'Spaethii' Sycamore Maple 'Tricolor'
Sycamore, American (spp.) Sycamore, American 'Howard'
Sycamore, Arizona Sycamore, California
Sycamore, Oriental (spp.) Sycamore, Oriental 'Insularis'
Sycamore, Western Sydney Blue Eucalyptus
Sydney Blue Gum Sydney Golden Wattle
'Sydney Pearce' Indian Horsechestnut 'Syke's Dwarf' Oakleaf Hydrangea
'Sylettas' Sweet Violet 'Sylvana Blue' Garden Petunia
'Sylvana Orchid Pink' Garden Petunia 'Sylvana Queen' Garden Petunia
'Sylvester' Goat's Beard 'Sylvestris' Chinese Juniper
'Symmes' Southern Magnolia Syrup Palm
Szechwan Spruce Table Fern (spp.)
Table Fern 'Evergemiensis' Table Fern 'Victoriae'
Table Palm Table-top Scotch Elm (spp.)
Table-top Scotch Elm Dwarf Table-top Scotch Elm 'Horizontalis'
'Tabuliformis' Norway Spruce 'Tai-Haka' Higan Cherry
Tail Flower Tailwort
'Taipei Silk' Hybrid Toad Lily Taiwan Cherry
Taiwan Juniper 'Takao' Japanese Maple
'Takiniyama' Japanese Maple 'Takyo yatsubusa' Japanese Maple
'Talent Rose Shades' Treasure Flower 'Talent' Treasure Flower
'Talent White' Treasure Flower Talipot Palm