Arctic Bluegrass
Arctic Pearlwort
Arctic Rush
Arctic Starflower
Arctic Sweet Coltsfoot
Arctic Willow
Aridland Goosefoot
Arizona Four-nerve Daisy
Armoracia
Arnica
Arrow Thelypody
Arrowgrass
Arrowhead
Arrowleaf Balsamroot
Arrowleaf Buckwheat
Arrowleaf Ragwort
Arrowleaf Rattlesnakeroot
Arrowleaf Sweet Coltsfoot
Arroyo Willow
Arumleaf Arrowhead
Asian Forget-me-not
Asparagus
Aspen Fleabane
Aster
Aunt Lucy
Austin Knotweed
Austrian Draba
Austrian Yellowcress
Autumn Dwarf Gentian
Avens
Awl-leaf Lilaea
Awlfruit Sedge
Awlwort
Awned Halfchaff Sedge