Velvetgrass _Holcus_ 22 Velvetleaf _Abutilon theophrasti_ 35 Venuslookingglass _Specularia_ 53 Verbena _Verbena_ 54 Vernalgrass _Anthoxanthum_ 18 Vetch _Vicia_ 34 Viburnum _Viburnum_ 59 Vinemesquite _Panicum obtusum_ 23 Violet _Viola_ 55 Virginsbower _Clematis virginiana_ 39 Wahoo, eastern _Euonymus atropurpureus_ 56 Walkingfern _Camptosorus_ 28 Walnut _Juglans_ 57 Watercress _Rorippa_ 51 Waterhemlock _Cicuta_ 39 Waterhemp _Acnida_ 35 Waterhyssop, disk _Bacopa rotundifolia_ 37 Waterleaf _Hydrophyllum_ 45 Waterlily _Nymphaea_ 48 Waterplantain _Alisma_ 29 Waterprimrose _Jussiaea_ 45 Waterstarwort _Callitriche_ 38 Wedgescale _Sphenopholis_ 25 Westerndaisy _Astranthium_ 37 Wheat _Triticum_ 26 Wheatgrass _Agropyron_ 18 Whitegrass _Leersia virginica_ 22 Widgeongrass _Ruppia_ 30 Wildbean _Strophostyles_ 34 Wildginger _Asarum_ 36 Wildindigo _Baptisia_ 31 Wildrice _Zizania_; _Zizaniopsis_ 26 Wildrye _Elymus_ 21 Willow _Salix_ 58 Willowweed _Epilobium_ 41 Windmillgrass _Chloris verticillata_ 20 Wingstem _Verbesina alternifolia_ 55 Wintercress _Barbarea_ 37 Winterfat _Eurotia_ 56 Wirelettuce _Stephanomeria_ 54 Wisteria _Wisteria_ 35, 59 Witchgrass _Leptoloma_; _Panicum_ 22, 23