Trichostema setaceum (blue curls) Lamiaceae ((5) (5) 2+2 1) 409 --

Tridens flavus (purpletop or grease grass) Poaceae 736

Trientalis borealis (starflower) Primulaceae ((7) 7 7 1) --

Trifolium arvense (rabbit foot clover) 269 --

Trifolium aureum (yellow clover) 271 -- fls yellow; middle lflt stalkless or nearly so

Trifolium campestre (pinnate hop clover) 271 -- 1/3-1/2" long fl heads w/ more than 15 fls

Trifolium dubium (least hop clover) 271 -- 1/4" long fl heads of 3-15 fls

Trifolium fragifermum (strawberry clover) 269

Trifolium hirtum 269 --

Trifolium hybridum (alslike clover) 270 -- fls pink or pinkish; heads long-stalked

Trifolium incarnatum (crimson clover) 269 -- scarlet red fls

Trifolium medium (zigzag clover) 269 --

Trifolium pratense (red clover) 269 --

Trifolium repens (white clover) 270 --

Trifolium resupinatum (Persian clover) 270 --

Trifolium sp. (hop clover) Fabaceae (5 5 10 1 perf or unisex; peri) 269-271 --

Trifolium striatum (clover) 269 -- Triglochin maritimum (common arrowgrass) Juncaginaceae (3or6 t 6 ? unisex; us anemophilous) 608 --

Triglochin palustre (slender arrowgrass) Juncaginaceae (3or6 t 6 ? unisex; us anemophilous) 608 --

Trillium cernuum (nodding trillium) Liliaceae (3 3 6 3) 796 -- white or pale pink, nodding

Trillium erectum (purple trillium) Liliaceae (3 3 6 3) 796 -- maroon, dk purple, white; ill-scented

Trillium grandiflorum (big white trillium) Liliaceae (3 3 6 3) 795 -- white, turning pink

Trillium sulcatum Liliaceae (3 3 6 3) 795 --

Trillium undulatum (painted trillium) Liliaceae (3 3 6 3) 795 -- white w crimson veining at petal bases

Triodanis biflora (two-flowered triodanis) Campanulaceae (5(5) 5 5 3-5) 466 --

Triodanis leptocarpa (triodanis) Campanulaceae (5(5) 5 5 3-5) 466 --

Triodanis perfoliata (round-leaved triodanis) Campanulaceae (5(5) 5 5 3-5) 466 --

Triosteum angustifolium (lesser horse gentian) Caprifoliaceae ((5) 5 5 1 half to wholly inf) 481 --

Triosteum aurantiacum (horse gentian) Caprifoliaceae ((5) 5 5 1 half to wholly inf) 482 -- fls dull prplsh-red, stalkless in axils; OE egg-shaped to 10"

Triosteum perfoliatum (perfoliate horse gentian) Caprifoliaceae ((5) 5 5 1 half to wholly inf) 481 -- woods & thickets, often in thin or rocky soil

Triphora trianthophora (nodding pogonia) Orchidaceae (2+1z 3 1-2 3) 824 -- pale pink or whitish fls us in 3's; AE clasping

Triplasis purpurea (purple sand grass) Poaceae 736 -- small clumps; stems stiff; fl branches short, often tucked inside short, stiff lvs; fl scales purple

Tripsacum dactyloides (gama grass) Poaceae 774 -- wide, cornlike lvs; stigmas purple, stamens orange

Trisetum flavescens Poaceae 711 --

Trisetum melicoides Poaceae 710 --

Trisetum spicatum Poaceae 709 --

Triticum aestivum (wheat) 730 Poaceae -- fl cluster fat & round, blue-green then tan; w or w/out bristles

Trollius laxus (globe flower) Ranunculaceae (5-7 0 N 1) 045 -- fls greenish-yellow, solitary; AD palmate

Tsuga canadensis (eastern hemlock) Pinaceae 032 -- needles distichous

Tulipa sylvestris (tulip) Liliaceae (3 3 6 3) 793 --

Tussilago farfara (colt's foot) Asteraceae/Senecioneae 528 -- lvs white-felty beneath

Typha angustifolia (narrow-leaved cattail) Typhaceae (0 x 2-5 0/0 x 0 1) 778 --

Typha latifolia (broad-leaved cattail) Typhaceae (0 x 2-5 0/0 x 0 1) 778 -- lvs narrow

U

Ulex europaeus (gorse) Fabaceae (5 5 10 1 peri) -- yellow, dense, spiny shrub; AT stiff, spiny; sandy soil

Ulmaceae (elm) -- Celtis (hackberry); Ulmus (elm)

Ulmus americana (American elm) Ulmaceae 068-- lvs to 6"

Ulmus pumila (Siberian elm) Ulmaceae -- lvs only 2-3", smooth/glabrous or with axillary tufts

Ulmus rubra (slippery elm) Ulmaceae 068 -- lf stalks & twigs very hairy; lvs 6 or 8"

Urtica dioica v. dioica (stinging nettle) Urticaceae 071 -- 0 4 4 0/0 2+2 0 1

Urtica dioica v. procera (tall stinging nettle) Urticaceae 071 -- 0 4 4 0/0 2+2 0 1; lvs sedldom cordate at base

Urticaceae (nettle) -- Boehmeria (false nettle); Laportea; Parietaria; Pilea (clearweed); Urtica (stinging nettle)

Utricularia biflora (two flowered bladderwort) 464 -- shallow water on coastal plain

Utricularia cornuta (horned bladderwort) 462 -- yellow 3/4" fls, w/ conspic spur projecting downward

Utricularia fibrosa (fibrous bladderwort) 464 --

Utricularia geminiscapa (mixed bladderwort) 463 --

Utricularia gibba (humped bladderwort) 464 -- yellow 1/4" fls; lf divisions & bladders few

Utricularia inflata (inflated bladderwort) 463 -- yllw 2/3" fls; lvs w/ inflated stalks; ponds along coastal plain

Utricularia intermedia (flat-leaved bladderwort) 463 -- yellow 1/2", lower lip 2x upper fls

Utricularia juncea (rushlike bladderwort) 462 --

Utricularia minor (lesser bladderwort) 463 --

Utricularia purpurea (purple bladderwort) 463 -- purple about 1/2" w/ 3-lobed lower lip

Utricularia raiata (floating bladderwort) 463 --

Utricularia resupinata (resupinate bladderwort) 463 -- fls purple; edge of ponds

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