'Luscious® Citrus Blend' Lantana 'Luscious® Grape' Lantana
'Luscious® Lemonade' Lantana Lusterleaf Holly
'Lutea' American Arborvitae 'Lutea' Crown Imperial Fritillary
'Lutea' Monterey Cypress 'Lutea Zebrina' American Arborvitae
Lychee (spp.) Lychee 'Brewster'
Lychnis 'Jenny' Lychnis 'Nana Peggy'
Lycoris, Autumn Lycoris, Short tube
Lydia Broom (spp.) Lydia Woodwaxen (spp.)
Lyme Grass 'Manhattan' Lyme Grass (spp.)
Lyme Grass Blue 'Lynwood Gold' Border Forsythia: intermediahybrid
Lyonia Lyonia, Fetterbush
Lyre-Leaf Sage 'Burgundy Bliss' Lyre-Leaf Sage 'Purple Knockout'
Lysiloma Lysimachia 'Ecosatin'
Maackia, Amur Maackia: amurensis, Amur
Maak's Honeysuckle Macadamia 'Dr. Beaumont'
Macarthur Palm Mace Sedge
Macedonian Pine 'Machino' Japanese Maple
'Macho' Amur Corktree Macho, Ocotillo
'Macintosh' Daylily 'Macopin' Eastern White Pine
Macquarie Pine 'Macrantha' Royal Purple Brunfelsia
Macranthum Azalea (spp.) Macranthum Azalea 'Kate Arendall'
'Macrophylla' Canadian Hemlock 'Macrostachya' Common Lilac
'Maculatum' Norway Maple Madagascar Dragon Tree
Madagascar Jasmine Madagascar Olive
Madagascar Periwinkle (spp.) Madagascar Periwinkle 'First Kiss Blueberry'
Madagascar Periwinkle 'Parasol' Madagascar Periwinkle 'Pastels Mix'
Madagascar Periwinkle 'Pretty in Rose' Madagascar Periwinkle 'Raspberry Cooler'
Madagascar Periwinkle 'Rose Carpet' Madagascar Periwinkle 'Stardust Mix'
Madagascar Periwinkle 'Stardust Orchid' 'Madame Briot' English Holly
'Madame Emile Mouillere' Bigleaf Hydrangea 'Madame GJ Bier' Bigleaf Hydrangea
Madeira Island Geranium 'Madonna' Black Elderberry
Madrone Madrone, Pacific
Madrone, Texas Madwort: spinosum
Magellan Barberry Dwarf 'Magellan Coral' Common Zinnia
'Magenta Red' Crapemyrtle 'Maggie Belle Slocum' Sacred Lotus
'Maggie Brown' Azalea 'Magic Berry' Snowberry
'Magic Burgundy' Scarlet Sage: splendens 'Magic Carpet' Japanese Spirea
'Magic Carpet' Wild Thyme Magic Flower
Magic Flower of the Incas 'Magic Fountain Lavender' Delphinium: cultorumhybrid
'Magic Fountain White' Delphinium: cultorumhybrid 'Magic Fountains' English Larkspur
Magic Lily: squamigera 'Magic Wand' Alumroot: Heuchera
'Magician' Rose Deutzia 'Magilla' Beefsteak Plant