UMass Extension Weed Herbarium
| Common Name | Scientific Name | Family Name | |
|---|---|---|---|
| toadflax, yellow | Linaria vulgaris | Scrophulariaceae - Figwort Family | |
| tobacco, Indian | Lobelia inflata | Lobeliaceae - Bluebell Family | |
| touch-me-not, pale | Impatiens pallida | Balsaminaceae - Touch-Me-Not Family | |
| touch-me-not, spotted | Impatiens capensis | Balsaminaceae - Touch-Me-Not Family | |
| tree-of-Heaven | Ailanthus altissima | Simaroubaceae - Quassia Family | |
| tree-that-grows-in-Brooklyn | see - tree-of-Heaven | ||
| trefoil, birdfoot | Lotus corniculatus | Fabaceae (Leguminosae) - Pea or Bean Family | |
| trumpetweed | see - Joe-pye weed, hollow-stemmed | ||
| turkeyclaw | see - big bluestem | ||
| turkeyfoot | see - big bluestem | ||
| umbrellawort, heart-leaved | see - four-o'-clock, wild | ||
| valerian , common | Valeriana officinalis | Valerianaceae - Valerian Family | |
| velvet grass, common | Holcus lanatus | Poaceae (Graminae) - Grass Family | |
| velvetleaf | Abutilon theophrasti | Malvaceae - Mallow Family | |
| Venus lookingglass | Triodanis perfoliata | Campanulaceae - Bluebell Family | |
| vernalgrass, sweet | Anthoxanthum odoratum | Poaceae (Graminae) - Grass Family | |
| vervain, blue | Verbena hastata | Verbenaceae - Verbena Family | |
| vervain, bracted | see - vervain, prostrate | ||
| vervain, common | see - vervain, blue | ||
| vervain, large bracted | see - vervain, prostrate | ||
| vervain, prostrate | Verbena bracteata | Verbenaceae - Verbena Family | |
| vervain, white | Verbena urticifolia | Verbenaceae - Verbena Family | |
| vetch, bird | Vicia cracca | Fabaceae (Leguminosae) - Pea or Bean Family | |
| violet, common blue | Viola papilionacea | Violaceae - Violet Family | |
| violet, field | Viola arvensis | Violaceae - Violet Family | |
| virgin's bower | Clematis virginiana | Ranunculaceae - Buttercup Family | |
| Virginia creeper | Parthenocissus quinquefolia | Vitaceae - Grape Family | |
| wallflower, worm-seed | see - mustard, wallflower | ||
| water hemlock, spotted | Cicuta maculata | Apiaceae (Umbelliferae) - Carrot Family | |
| water-horehound | see - bugleweed, american | ||
| water-horehound, cut-leaves | see - bugleweed, american | ||
| watergrass | see - barnyardgrass | ||
| waygrass | see - knotweed, prostrate | ||
| wheatgrass | see - quackgrass | ||
| whiteman's footprint | see - plantain, broadleaf | ||
| whitlow grass, spring | Draba verna | Brassicaceae (Cruciferae) - Mustard Family | |
| whitlowwort | see - whitlow grass, spring | ||
| wild rye, Canadian | Elymus canadensis | Poaceae (Graminae) - Grass Family | |
| willowherb, American | Epilobium ciliatum | Onagraceae - Evening Primrose Family | |
| willowherb, glanular | see - willowherb, American | ||
| willowherb, great | see - fireweed | ||
| wineberry, wine raspberry | Rubus phoenicolasius | Rosaceae - Rose Family | |
| wingstem | Verbesina alternifolia | Asteraceae (Compositae) - Aster or Sunflower Family | |
| wintergrass | see - bluegrass, annual | ||
| wiregrass | see - goose grass | ||
| witchgrass | Panicum capillare | Poaceae (Graminae) - Grass Family | |
| woodbine | see - Virginia creeper | ||
| woodgrass | see - Indiangrass, yellow | ||
| woodsorrel, creeping | Oxalis corniculata | Oxalidaceae - Woodsorrel Family | |
| woodsorrel, yellow | Oxalis stricta | Oxalidaceae - Woodsorrel Family |