Maclura          

Madagascar Dropseed          

Madwort          

Maiden Blue Eyed Mary      

Maiden Fern          

Maidenhair Fern          

Maidenstears          

Malabar Sprangletop          

Mallow          

Mammoth Wildrye      

Man Of The Earth          

Mandan Ricegrass          

Mannagrass          

Manyflower Stickseed          

Manyfruit Primrose-willow          

Manyhead Hymenopappus          

Manystem Pea          

Maple          

Mapleleaf Goosefoot          

Marbleseed          

Marijuana          

Mariposa Lily          

Marsh Arrowgrass          

Marsh Bellflower      

Marsh Elder          

Marsh Marigold          

Marsh Muhly      

Marsh Pea          

Marsh Seedbox      

Marsh Skullcap          

Marsh St. Johnswort          

Marshland Goosefoot          

Marshmallow          

Marshpepper Knotweed      

Maryland Sanicle          

Maryland Senna      

Mat Amaranth          

Mat Muhly      

Mat Prickly Phlox          

Mat Sandbur          

Mat Vetch          

Matrimony Vine          

Matted Grama          

Matted Sandmat