Marjoram Marjoram, Annual 'Compactum'
Marjoram, Annual 'Sicillian' Marjoram, Hop (spp.)
Marjoram, Hop 'Amargcus Dictamnus' Marjoram, Knotted 'Compactum'
Marjoram, Knotted 'Sicillian' Marjoram, Pot (spp.)
Marjoram, Pot Golden Marjoram, Pot 'Thumbles'
Marjoram, Pot Variegated Marjoram, Sweet 'Compactum'
Marjoram, Sweet 'Sicillian' 'Markham's Pink' Large Petal Clematis
Marlberry (spp.) Marlberry 'Cherimen'
Marlberry, Variegated Japanese Marlberry: escallonioides
'Marliacea Albida' Waterlily 'Marmalade' Black-eyed Susan
Marmalade Bush 'Marmo' Freeman Maple
'Marmorata' Deutzia: scabra 'Mars' Coleus
Marsh Afrikaner Marsh Betony
Marsh Blue Violet 'White Czar' Marsh Grass
Marsh Grass: bakeri Marsh Mallow
Marsh Marigold Marsh Milkweed (spp.)
Marsh Milkweed 'Ice Ballet' Marsh Rosemary
Marsh Tea 'Milky Way' Marsh Woundwort
'Marshall' Douglas Fir 'Marshal's Delight' Bee Balm: didyma
Martagon Lily Martha Washington Geranium 'Aztec'
Martha Washington Geranium 'Ballerina' Martha Washington Geranium 'Delilah'
Martha Washington Geranium 'Flair' Martha Washington Geranium 'Martha Washington'
'Martha Washington' Martha Washington Geranium 'Martin Frobisher' Rose
Marvel Of Peru (spp.) 'Mary Ann' Chinese Evergreen
'Mary Bea' Cymbidium Orchid 'Mary Cave' Rose
'Mary Dunn' Louisiana Iris 'Mary Eddinglow' Japanese Maple
'Mary' Florist's Chrysanthemum 'Mary Frances' Tall Bearded German Iris
'Mary Gregory' Stokes' Aster 'Mary Holman' American Holly
'Mary Kittel' Rose 'Mary Lovett' Rose
'Mary Marie Ann' Hosta 'Mary Milton' Doublefile Viburnum: plicatum
'Mary Nell' Holly 'Mary Potter' Flowering Crabapple
'Mary Sumner' Rose 'Mary Todd' Daylily
'Mary's Gold' Daylily 'Masamune' Dwarf Sweet Flag
'Masja' Bigleaf Hydrangea 'Mason's Hybrid' Spider Flower
Mass Cane (spp.) Mass Cane 'Limelight'
Mass Cane 'Massangeana' 'Massachusetts' Manzanita
'Massangeana' Corn Plant 'Massena' American Arborvitae
Masterwort, Great Masterwort, Greater (spp.)
Masterwort, Greater 'Shaggy' Masterwort, Large
Mastic Mastic Tree
Mastic, Mount Atlas Mat Rush, Spiny Headed
Matacora 'Matanzaki' Japanese Euonymus
Matape Beargrass Match-me-if-you-can (spp.)
Match-me-if-you-can 'Haleakala' Match-me-if-you-can 'Louisiana Red'
Match-me-if-you-can 'Obovata' Match-me-if-you-can 'Petticoat'
Maternity Plant Matgrass
'Mathilda Gutges' Bigleaf Hydrangea 'Mathotiana' Japanese Camellia
Matilija Poppy Matilja Poppy
Matricaria (spp.) Matricaria Golden
Matted Bush Pea 'Matthew' Japanese Maple