Medicago lupulina
Black Medick
Melampyrum arvense
Field Cow-wheat
Melampyrum pratense
Common Cow-wheat
Melilotus albus
White Melilot
Melilotus altissimus
Tall Melilot
Melilotus officinalis
Ribbed Melilot
Melittis melissophyllum
Bastard Balm
Mentha aquatica
Water Mint
Mentha arvensis
Corn Mint
Mentha x piperita
Peppermint
Menyanthes trifoliata
Bogbean
Mercurialis annua
Annual Mercury
Mercurialis perennis
Dog's Mercury
Meum athamanticum
Spignel
Mimulus guttatus
Monkeyflower
Mimulus x robertsii
Hybrid Monkeyflower
Moehringia trinervia
Three-nerved Sandwort
Molinia caerulea
Purple Moor-grass
Myosotis alpestris
Alpine Forget-me-not
Myosotis discolor
Changing Forget-me-not
Myosotis laxa
Tufted Forget-me-not
Myosotis scorpioides
Water Forget-me-not
Myosotis stricta
Myriophyllum alterniflorum
Alternate Water-milfoil