Plants with white flowers
 Leucanthemum vulgare (Ox-eye Daisy) |
 Leucophysalis grandiflora (Large White Ground-Cherry) |
 Limosella aquatica (Mudwort) |
 Lithophragma glabrum (Rockstar) |
 Lobelia spicata (Spiked Lobelia) |
 Lomatium macrocarpum (Long-Fruited Parsley) |
 Lomatium orientale (White-Flowered Parsley) |
 Lomatogonium rotatum (Marsh Felwort) |
 Lonicera tatarica (Tatarian Honeysuckle) |
 Lonicera villosa (Blue Fly Honeysuckle) |
 Lycopus americanus (Water-Horehound) |
 Lycopus asper (Western Water-Horehound) |
 Lycopus uniflorus (Northern Water-Horehound) |
 Lysimachia maritima (Sea Milkwort) |
 Maianthemum canadense (Wild Lily-of-the-Valley) |
 Maianthemum racemosum (Wild Spikenard) |
 Maianthemum stellatum (Star-Flowered Solomon's Seal) |
 Maianthemum trifolium (Three-Leaved Solomon's Seal) |
 Malaxis monophyllos var. brachypoda (White Adder's Mouth) |
 Malva pusilla (Round-Leaved Mallow) |
 Melampyrum lineare (Cow-Wheat) |
 Mentzelia decapetala (Evening Star) |
 Menyanthes trifoliata (Buck-Bean) |
 Micranthes occidentalis (Rhomboid-leaved Saxifrage) |
 Micranthes pensylvanica (Swamp Saxifrage) |
 Minuartia rubella (Boreal Sandwort) |
 Moehringia lateriflora (Blunt-Leaved Sandwort) |
 Moneses uniflora (One-Flowered Wintergreen) |