Complete list of species
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| scientific name | common name(s) | image gallery |
| Magnolia tripetala | Umbrella Tree Umbrella Magnolia | |
| Magnolia virginiana | Sweetbay Sweetbay Magnolia Southern Sweetbay Swampbay Swamp Magnolia Sweet Magnolia Small Magnolia Laurel Magnolia White Bay White Laurel Swamp Laurel Beaver Tree | |
| Mahonia aquifolium | Holly-leaved Barberry Holly-leaf Oregon-grape | |
| Mahonia dictyota | Shining Netvein Barberry Jepson's Oregon Grape Jepson's Oregon-grape | |
| Mahonia fremontii | Fremont's Mahonia Desert Oregon-grape Fremont Barberry Holly Grape | |
| Mahonia haematocarpa | Red Barberry Red Oregon-grape Algerita | |
| Mahonia nervosa | Cascade Barberry Cascade Oregon-grape Dwarf Oregon-grape | |
| Mahonia nevinii | Nevin's Barberry | |
| Mahonia pinnata | Wavyleaf Barberry Shinyleaf Mahonia California Barberry | |
| Mahonia pinnata ssp. insularis | Island Barberry | |
| Mahonia pinnata ssp. pinnata | California Barberry Coast Barberry Shiny Leaf Barberry | |
| Mahonia repens | Creeping Barberry Creeping Oregon-grape | |
| Mahonia swaseyi | Texas Barberry Texas Oregon-grape | |
| Mahonia trifoliolata | Agarita Agarito Algerita Laredo Mahonia Laredo Oregon-grape Trifoliate Barberry Wild Currant | |
| Maianthemum canadense | Canada Mayflower False Lily-of-the-valley | |
| Maianthemum dilatatum | False Lily Of The Valley May Lily Canada Mayflower | |
| Maianthemum racemosum | Feathery False Lily Of The Valley False Solomon's Seal Feathery False Solomon's Seal False Spikenard Solomon's Plume Smilacina | |
| Maianthemum racemosum ssp. amplexicaule | Feathery False Lily Of The Valley Western False Solomon's Seal Solomon's Plume False Spikenard | |
| Maianthemum racemosum ssp. racemosum | Feathery False Lily Of The Valley False Spikenard False Solomon's Seal Solomon's Plume Smilacina | |
| Maianthemum stellatum | Starry False Lily Of The Valley Starry False Solomon's Seal Star-flowered Solomon's Seal | |
| Maianthemum trifolium | Three-leaf False Lily Of The Valley Three-leaved False Lily Of The Valley Three-leaf Solomon's Seal Three-leaved Solomon's Seal | |
| Malachra capitata | Yellow Leafbract Malva De Caballo Horse Mallow | |
| Malachra fasciata | Roadside Leafbract | |
| Malacomeles denticulata | Southern False Serviceberry Big Bend Serviceberry | |
| Malacothamnus abbottii | Abbot's Bushmallow Abbott's Bush Mallow Monterey Bush-mallow | |
| Malacothamnus aboriginum | Gray Bush Mallow Gray Bushmallow Indian Valley Bush-mallow Indian Valley Bushmallow | |
| Malacothamnus clementinus | San Clemente Island Bushmallow | |
| Malacothamnus davidsonii | Davidson's Bush Mallow Davidson's Bushmallow Sand Bush-mallow | |
| Malacothamnus densiflorus | Dense Bush-mallow Dense-flowered Bushmallow Many-flowered Bush Mallow Yellowstem Bushmallow | |
| Malacothamnus fasciculatus | Chaparral Mallow Chaparral Bush Mallow Chaparral Bush-mallow | |
| Malacothamnus fremontii | Fremon's Bushmallow Fremont's Bush Mallow Fremont’s Bushmallow White-coat Bush-mallow | |
| Malacothamnus jonesii | Jones's Bush Mallow Jones’s Bushmallow San Luis Obispo Bushmallow Slender Bush-mallow Slender Bushmallow | |
| Malacothamnus marrubioides | Foothill Bush Mallow Foothill Bush-mallow Horehound Bush Mallow Pink-flowered Bushmallow Pinkflowered Bushmallow | |
| Malacothamnus mendocinensis | Mendocino Bush Mallow Mendocino Bush-mallow | |
| Malacothamnus palmeri | Palmer's Bushmallow San Lucia Bush-mallow Santa Lucia Bush Mallow Santa Lucia Bushmallow | |
| Malacothrix californica | California Desertdandelion | |
| Malacothrix clevelandii | Cleveland's Desertdandelion | |
| Malacothrix coulteri | Snake's Head Snakehead | |
| Malacothrix fendleri | Fendler's Desertdandelion | |
| Malacothrix floccifera | Woolly Desertdandelion | |
| Malacothrix foliosa | Leafy Desertdandelion | |
| Malacothrix foliosa ssp. crispifolia | Petite Desertdandelion | |
| Malacothrix foliosa ssp. foliosa | Leafy Desertdandelion | |
| Malacothrix foliosa ssp. philbrickii | Philbrick's Desertdandelion | |
| Malacothrix foliosa ssp. polycephala | Manyhead Desertdandelion | |
| Malacothrix glabrata | Smooth Desertdandelion Desert-dandelion | |
| Malacothrix incana | Dunedelion Dune Malacothrix | |
| Malacothrix indecora | Santa Cruz Island Desertdandelion | |
| Malacothrix junakii | Anacapa Island Desertdandelion Junak's Desertdandelion | |
| Malacothrix phaeocarpa | Davis' Desertdandelion | |
| Malacothrix saxatilis | Cliff Desertdandelion | |
| Malacothrix saxatilis var. arachnoidea | Carmel Valley Malacothrix Cliff Desertdandelion | |
| Malacothrix saxatilis var. commutata | Cliff Desertdandelion South Coast Range Malacothrix | |
| Malacothrix saxatilis var. implicata | Cliff Aster Cliff Desertdandelion Cliff Malacothrix | |
| Malacothrix saxatilis var. saxatilis | Cliff Aster Cliff Desertdandelion | |
| Malacothrix saxatilis var. tenuifolia | Cliff Desertdandelion Short Leaved Cliff Aster | |
| Malacothrix similis | Twin Desertdandelion | |
| Malacothrix sonchoides | Sowthistle Desertdandelion | |
| Malacothrix sonorae | Sonoran Desertdandelion | |
| Malacothrix squalida | Island Desertdandelion Santa Cruz Desertdandelion | |
| Malacothrix stebbinsii | Stebbins' Desertdandelion | |
| Malacothrix torreyi | Torrey's Desertdandelion | |
| Malaxis bayardii | Bayard's Adder's-mouth Orchid | |
| Malaxis brachypoda | White Adder's-mouth Orchid | |
| Malaxis corymbosa | Huachuca Mountain Adder's-mouth Orchid Madrean Adder's Mouth | |
| Malaxis monophyllos | Adder's-mouth Orchid White Adder's Mouth White Adder's Tongue | |
| Malaxis paludosa | Bog Adder's Mouth Bog Adder's-mouth Orchid Bog Malaxis Marsh Malaxis | |
| Malaxis porphyrea | Cochise Adder's Mouth Orchid Cochise Adder's-mouth Orchid Purple Malaxis | |
| Malaxis soulei | Chiricahua Adder's Mouth Chiricahua Adder's-mouth Orchid Mountain Adder's Mouth Mountain Malaxis | |
| Malaxis spicata | Florida Adder's-mouth Orchid | |
| Malaxis tenuis | Arizona Adder's Mouth Orchid Arizona Adder's-mouth Orchid Slender-flowered Malaxis | |
| Malaxis unifolia | Green Adder's-mouth Orchid | |
| Malaxis wendtii | Wendt's Adder's-mouth Orchid | |
| Malosma laurina | Laurel Sumac Laurel-leaf Sumac | |
| Malperia tenuis | Brown Turbans Brownturbans | |
| Malpighia glabra | Barbados Cherry Wild Crapemyrtle Acerola Manzanita | |
| Malus angustifolia | Southern Crabapple Narrowleaf Crabapple Wild Crabapple Southern Crab Narrowleaf Crab Wild Crab | |
| Malus angustifolia var. angustifolia | Narrow-leaved Crabapple Southern Crab Apple Southern Crabapple | |
| Malus angustifolia var. puberula | American Crabapple Fragrant Crabapple Garland Tree Southern Crab Apple Sweet Crabapple | |
| Malus coronaria | Sweet Crabapple American Crab | |
| Malus fusca | Oregon Crabapple Pacific Crabapple | |
| Malus ioensis | Prairie Crabapple Iowa Crabapple Western Crabapple Prairie Crab Iowa Crab Western Crab | |
| Malus ioensis var. ioensis | Iowa Crabapple Prairie Crab Apple Prairie Crabapple Western Crabapple | |
| Malus ioensis var. texana | Texas Crabapple Blanco Crabapple | |
| Malvastrum americanum | Indian Valley False Mallow | |
| Malvastrum aurantiacum | Wright's False Mallow | |
| Malvastrum bicuspidatum | Shrubby False Mallow Sonoran Desert False Mallow | |
| Malvastrum corchorifolium | Caribbean False Mallow False Mallow | |
| Malvastrum hispidum | Hispid False Mallow | |
| Malvaviscus arboreus | Turkscap Wax Mallow Bleeding Hearts Mexican Apple Manzanita | |
| Malvaviscus arboreus var. drummondii | Turk's Cap Drummond's Turk's Cap Drummond Turk's Cap Wax Mallow Drummond's Wax Mallow Drummond Wax Mallow Red Mallow Texas Mallow Mexican Apple Sleeping Hibiscus Bleeding Hearts Manzanita | |
| Malvella lepidota | Scurfymallow Malvalla | |
| Malvella leprosa | Alkali Mallow | |
| Malvella sagittifolia | Arrow-leaf Mallow Arrowleaf Mallow | |
| Mammillaria barbata | Greenflower Nipple Cactus | |
| Mammillaria dioica | Strawberry Cactus California Fishhook Cactus | |
| Mammillaria grahamii | Graham's Nipple Cactus Arizona Fishhook Cactus | |
| Mammillaria heyderi | Little Nipple Cactus Heyder Pincushion Cactus | |
| Mammillaria heyderi var. bullingtoniana | Cream Cactus Little Nipple Cactus | |
| Mammillaria heyderi var. hemisphaerica | Little Nipple Cactus | |
| scientific name | common name(s) | image gallery |
