Flora of North America species comparison

erect to trailing, gray-green, apex often flexuous.

petiole 4–20(–30) mm;

blade usually triangular to subhastate, sometimes ovate, 1–4.5 × 0.8–3 cm, base cordate, hastate, or truncate, margins crenate to serrate, apex acute to obtuse.

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].

terminal or axillary, glands absent, staminate flowers 5–16 per raceme;

staminate bracts 0.9–2 mm.

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

glands subtending each bract 0.

staminate 0.7–1.2 mm, persistent base 0.2–0.8 mm;

pistillate 1.5–4 mm in fruit.

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

sepals 3–4, green, 0.9–1.2 mm;

stamens 3–4, filaments 0.2–0.7 mm.

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 lanceolate, 1–2.5 mm;

styles connate to 1/3 length, short-exserted;

stigmas undulate to subpapillate.

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.

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

7–8 mm wide.

brown with tan mottling, 2.5–3.5 mm.

globose to ovoid;

caruncle absent.

= 110.