Flora of North America species comparison

usually decumbent or twining, rarely erect, gray-green to light green, apex flexuous.

deciduous, alternate, simple (usually 3-foliolate in T. laciniata);

stipules present, persistent;

petiole present, glands absent;

blade usually unlobed, sometimes lobed basally (sometimes deeply 3-lobed in T. laciniata) [palmately lobed], margins serrate, crenate, dentate, or entire, laminar glands absent;

venation pinnate or palmate at base, pinnate distally [palmate].

petiole 15–85 mm;

blade ovate to broadly cordate, 4.5–10(–13) × 3.5–10 cm, base cordate, margins serrate, apex acuminate.

bisexual (pistillate flowers proximal, staminate distal) [unisexual], axillary, terminal, or leaf-opposed, racemes [rarely with single pistillate branch];

glands subtending each bract 0.

terminal (often appearing leaf-opposed), glands absent, staminate flowers 20–60 per raceme;

staminate bracts 1.5–2 mm.

present, staminate with persistent base, pistillate elongated in fruit.

staminate 1.5–2.2 mm, persistent base 0.7–1 mm;

pistillate 2.5–3 mm in fruit.

sepals 3–5, usually green, sometimes reddish green, not petaloid, valvate, distinct;

petals 0;

nectary absent [present];

stamens 2–6(–10)[–25], distinct or connate basally (connate 1/2 length in T. nigricans);

pistillode present [absent].

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals 6, usually green, sometimes reddish green, not petaloid, connate basally;

petals 0;

nectary absent;

pistil 3-carpellate;

styles 3, connate basally to 1/2 [most of] length, unbranched.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

capsules, usually 3 carpels maturing, except often 1 maturing in T. brevispica.

11–13 mm wide.

globose to ovoid;

caruncle absent.

dark brown, 4.3–5.3 mm.

, 15–20 dm.