Macleaya          

Maclura          

Madwort          

Magnolia          

Mahaleb Cherry          

Maiden Fern          

Maidenhair Fern          

Maidenhair Spleenwort          

Maidenstears          

Malabar Sprangletop          

Mallow          

Maltese Star-thistle          

Maltesecross          

Man Of The Earth          

Manchurian Honeysuckle          

Mannagrass          

Manyflower Marshpennywort          

Manyfruit Primrose-willow          

Manzanita          

Maple          

Mapleleaf Goosefoot          

Mapleleaf Viburnum      

Marbleseed          

Marginal Woodfern          

Marijuana          

Marsh Arrowgrass          

Marsh Bellflower      

Marsh Blue Violet          

Marsh Bristlegrass          

Marsh Cudweed          

Marsh Elder          

Marsh Flatsedge      

Marsh Marigold          

Marsh Mermaidweed          

Marsh Muhly      

Marsh Pea          

Marsh Seedbox      

Marsh Skullcap          

Marsh St. Johnswort          

Marshpepper Knotweed      

Marvel Of Peru          

Maryland Meadowbeauty          

Maryland Sanicle          

Maryland Senna