Plants with all other flower colours and opposite or whorled leaves - forest
 Agastache foeniculum (Giant Hyssop) |
 Anemone multifida (Cut-Leaved Anemone) |
 Apocynum androsaemifolium (Spreading Dogbane) |
 Chimaphila umbellata (Prince's Pine) |
 Clematis occidentalis (Purple Clematis) |
 Collinsia parviflora (Blue-eyed Mary) |
 Dracocephalum parviflorum (American Dragonhead) |
 Galeopsis tetrahit (Hemp-Nettle) |
 Gentiana andrewsii (Closed Gentian) |
 Gentianella amarella (Northern Gentian) |
 Geranium bicknellii (Bicknell's Geranium) |
 Glechoma hederacea (Ground Ivy, Creeping Charlie) |
 Halenia deflexa (Spurred Gentian) |
 Houstonia longifolia (Long-Leaved Bluets) |
 Leonurus cardiaca (Motherwort) |
 Lilium philadelphicum (Western Red Lily, Western Wood Lily) |
 Linnaea borealis (Twinflower) |
 Lithospermum canescens (Hoary Puccoon) |
 Lonicera dioica (Twining Honeysuckle) |
 Lonicera tatarica (Tatarian Honeysuckle) |
 Neottia cordata (Heart-Leaved Twayblade) |
 Prunella vulgaris (Selfheal) |