Flora of North America species comparison

stellate hairs of younger stems dense, appressed, 4-armed, arms approximate in pairs, aligned with stem axis, lines of fine, curved hairs absent or obscured;

older growth grayish, rough, glabrescent.

older twigs gray, glabrescent.

stipules linear-subulate, 3–10 mm;

petiole primarily in distal 1/2, sometimes themselves shallowly pinnately lobed, surfaces scabridulous, hairs appressed-stellate, obscure nectary present abaxially on midvein near base.

stipules linear-lanceolate, (2–)3–7(–10) mm;

petiole subequal to blade, adaxial fine curved hairs absent or obscured;

blade markedly discolorous, broadly ovate, unlobed or shallowly 3-angulate-lobate, 2–8 × 2–8.5 cm, base cordate, margins irregularly dentate or dentate-serrate, apex broadly acute to rounded, surfaces densely tomentose abaxially, less so adaxially, inconspicuous nectary abaxially on midvein near base.

solitary flowers in axils of distal leaves.

solitary flowers in axils of distal leaves.

jointed below apices, to 17 cm, usually much exceeding subtending leaves;

involucellar bractlets 8–14, linear-subulate, 1–2 cm, margins ciliate.

jointed below apices, 4–10 cm, exceeding subtending petioles, elongating in fruit;

involucellar bractlets (7 or)8–10, narrowly rhombic-elliptic, 1.2–2(–2.4) cm, enlarging in fruit, margins not or inconspicuously ciliate.

erect or ascending;

calyx divided 3/4+ length, funnelform, 1.4–2.2 cm, equaling or slightly exceeding involucel, lobes narrowly lanceolate-triangular, margins ciliate, apices attenuate, nectaries absent;

corolla rotate, petals yellow to cream, usually with dark to obscure maroon lines basally, asymmetrically obovate to broadly obovate, 1.6–4 × 1–3.5 cm, margins ± entire, sparingly hairy abaxially where exposed in bud;

staminal column straight, yellow or cream, 0.6–1.4 cm, bearing filaments throughout, free portion of filaments not secund, 1–3 mm;

pollen yellow-orange;

styles cream, 1.5–5 mm;

stigmas maroon or cream.

horizontal or ascending;

calyx rotate to campanulate, lobed nearly to base, 1.4–2.4(–2.7) cm, larger in fruit, lobes narrowly triangular-ovate, apices acute to short-acuminate, nectaries absent;

corolla rotate to campanulate, petals bright red, asymmetrically obovate, 1.5–3 × 0.9–2.1 cm, margins ± entire, sometimes undulate, finely hairy abaxially where exposed in bud;

staminal column somewhat declinate, bright red, 0.9–1.4 cm, bearing filaments throughout, free portion of filaments secund, 1–5 mm;

pollen yellow-orange;

styles red, 2–7 mm;

stigmas red.

pale olivaceous gray with darker median stripe on each valve, ovoid or ellipsoid, 0.7–1.7 cm, to 2/3 calyces, apex rounded, hairy near apex or glabrous throughout.

yellowish brown, ovoid, 1.2–2 cm, apex apiculate, glabrous or with minute hairs near apex and on sutures.

dark brown, angulately reniform-ovoid, 2.4–3 mm, silky-hairy ± throughout.

dark brown, angulately reniform-ovoid, 3–4 mm, stellate-hairy throughout.

= 22 (Mexico: Nuevo León).