Leaves alternateLeaves alternate
 Acacia angustissima |
 Achillea millefolium |
 Actaea pachypoda |
 Aegopodium podagraria |
 Ailanthus altissima |
 Alisma triviale |
 Alliaria petiolata |
 Allium cepa |
 Allium tricoccum |
 Amelanchier arborea |
 Amianthium muscaetoxicum |
 Ampelopsis cordata |
 Anaphalis margaritacea |
 Anemone canadensis |
 Anemone virginiana |
 Angelica venenosa |
 Antennaria plantaginifolia |
 Anthemis arvensis |
 Arabidopsis thaliana |
 Arabis canadensis |
 Arabis laevigata |
 Arabis missouriensis |
 Arabis shortii |
 Aralia racemosa |
 Aralia spinosa |
 Argemone albiflora |
 Aruncus dioicus |
 Asclepias hirtella |
 Aster pilosus |
