Maianthemum

Maiden Pinks

Maltese Cross

Mayapple

Meadow Rue

Mertensia

Mexican Hat 

Michaelmas Daisy 
 

Milkweed

Missouri Primrose

Mist Flower

Monarda

Monkshood

Montbretia

Mountain Bluet

Mountain Mint

Nepeta 

New England Aster

​

Oenothera

Old Man's Whiskers

Ornamental Onion

Ozark Sundrop

​

napellus: "Axel Tschentscher", CC4, via Wikimedia Commons
punctata: Rhododendrites, CC4, via Wikimedia Commons
Walker’s Low: 阿橋 HQ, CC2, via Wikimedia Commons
Siskiyou: © Leerobin | dreamstime.com