Plants with white flowers
 Achillea alpina (Many-Flowered Yarrow) |
 Achillea millefolium (Yarrow) |
 Acmispon americanus (Spanish Clover) |
 Actaea rubra (Baneberry) |
 Alisma triviale (Common Water-Plantain) |
 Allium cernuum (Nodding Onion) |
 Allium textile (Prairie Onion) |
 Amelanchier alnifolia (Saskatoon) |
 Amerorchis rotundifolia (Round Leaved Orchid) |
 Anaphalis margaritacea (Pearly Everlasting) |
 Androsace septentrionalis (Pygmyflower) |
 Anemone canadensis (Canada Anemone) |
 Anemone cylindrica (Long-Fruited Anemone) |
 Anemone quinquefolia (Wood Anemone) |
 Anemone virginiana (Tall Anemone) |
 Antennaria anaphaloides (Tall Everlasting) |
 Antennaria aprica (Low Everlasting) |
 Antennaria neglecta (Common Pussy-Toes) |
 Antennaria parvifolia (Small-Leaved Everlasting) |
 Antennaria pulcherrima (Showy Everlasting) |
 Antennaria umbrinella (Brown-Bracted Everlasting) |
 Anticlea elegans var. elegans (Smooth Camas) |
 Apocynum androsaemifolium (Spreading Dogbane) |
 Apocynum cannabinum (Indian Hemp) |
 Arabidopsis lyrata (Lyre-Leaved Rock Cress) |
 Arabis pycnocarpa (Hirsute Rock Cress) |