histle, Globe, 117

Thistle, Milk, 117

Thistle, Russian, 28

Thistle, Sow, 117

Thlaspi, 46

Thorn-apple, 100

Thorny Amaranth, 30

Three-seeded Mercury, 66

Three-square, 7

Thuja, 1

Thymelaeaceae, 77

Thyme, Wild, 97

Thymus, 97

Tiarella, 51

Tickseed, 123, 124

Tickseed Sunflower, 124

Tick Trefoil, 62, 63

Tilia, 72

Tiliaceae, 72

Timothy, 4

Tipularia, 16

Toad-flax, 24, 103

Tobacco, Indian, 113

Tobacco, Wild, 101

Tofieldia, 14

Toothwort, 44

Touch-me-not, 71

Touch-me-not Family, 71

Tradescantia, 9

Tragopogon, 115

Trailing Arbutus, 85

Tree of Heaven, 65

Trientalis, 87

Trifolium, 60, 61

Triglochin, 3

Trillium, 12

Triosteum, 109

Trollius, 36

Tsuga, 1

Tulip Tree, 40

Tumble Weed, 30

Turk's-cap Lily, 12

Turtlehead, 104

Tussilago, 122

Tway-blade, 17

Twig Rush, 8

Twin-leaf, 40

Twin Flower, 109

Twisted-stalk, 11

Typha, 2

Typhaceae, 2

Ulmus, 24

Umbelliferae, 80

Umbrella-wort, 31

Upland Boneset, 122

Urtica, 24

Urticaceae, 23

Utricularia, 106

Uvularia, 12

Vaccinium, 85-87

Valerian, 111

Valeriana, 111

Valerianaceae, 111

Valerianella, 111

Valerian Family, 111

Valerian, Greek, 92

Vallisneria, 3

Velvet Leaf, 72

Venus' Looking Glass, 112

Verbascum, 101

Verbena, 99-100

Verbenaceae, 99

Verbena Family, 99

Vernonia, 122

Veronica, 104, 105

Vervain, 99, 100

Vetch, 59

Vetchling, 59

Vetch, Milk, 60

Viburnum, 111

Vicia, 59

Vinca, 90

Viola, 75, 76

Violaceae, 75

Violet, 75, 76

Violet Family, 75

Violet, Green, 75

Virginia Creeper, 71

Virginia Mallow, 73

Virginia Snakeroot, 25

Virgin's Bower, 35

Vitaceae, 71

Vitis, 72

Wahoo, 69

Waldsteinia, 55

Walnut, Black, 21

Walnut Family, 21

Water Arum, 9

Water Cress, 45

Water Crowfoot, 37

Water Dock, 26

Water Hemlock, 82

Water Hemp, 30

Water Hoarhound, 95

Water-leaf, 93

Water-leaf Family, 93

Water Lily, 35

Water Lily Family, 35

Water Lobelia, 113

Water Loosestrife, 77

Water Marigold, 123

Water Milfoil, 79

Water Milfoil Family, 79

Water Parsnip, 81

Water Pennywort, 80

Water Pimpernel, 87

Water Plantain, 3

Water Plantain Family, 3

Water Purslane, 78

Water Shield, 35

Water Smartweed, 27, 28

Water Speedwell, 105

Water Starwort, 68

Water Starwort Family, 68

Water-weed, 3

Water Willow, 10