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.

sometimes also with longer, stiff, simple hairs, fine, curved hairs absent or obscured.

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, 3–10 mm;

petiole 2/3 to equaling blade, shorter in inflorescence, fine, curved hairs absent or obscured adaxially;

blade somewhat discolorous, broadly to transversely ovate, unlobed or shallowly 3(–5)-lobed, rarely proximalmost deeply 5–7-lobed, mostly 6.5–11 × 6–12 cm, base cordate, often deeply so, margins unevenly serrate or crenate-serrate, apex broadly acute to short-acuminate, lobes broadly triangular, surfaces stellate-tomentulose, slitlike nectary present abaxially at or near base of midvein.

solitary flowers in axils of distal leaves.

solitary flowers in axils of distal leaves, sometimes appearing racemose by reduction of subtending leaves.

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

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

jointed at bases, to 2.5 cm, shorter than subtending petioles;

involucellar bractlets 9–12, sometimes wide-spreading, terete, 0.8–1.6 cm, margins minutely pubescent, setose, apex 2-fid or appendaged, sometimes obscurely so.

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 declinate;

calyx divided 1/2–2/3 length, campanulate, 1.5–2.4 cm, enlarging in fruit, lobes triangular, with 3 prominent ribs, 2 marginal, 1 medial, medial bearing conspicuous nectary, apices acute or acuminate, variously invested with both minute, stellate hairs and hispid with much larger, simple or stellate, pustular-based hairs, latter often largely confined to veins;

corolla narrowly funnelform, petals pink, maroon at base, obliquely obovate, 5.5–9.5 × 2.5–4.5 cm, margins entire to repand or crenate, finely hairy abaxially where exposed in bud;

staminal column straight, maroon, 3–4.5 cm, bearing filaments ± throughout, free portion of filaments not secund, 0.5–1.5 mm;

pollen maroon;

styles dark maroon, 1–3 mm;

stigmas dark maroon.

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.

brown, ovoid, 2–2.5 cm, apex acute and apiculate or acuminate, surface obscured by pale yellowish, simple, dense, antrorsely appressed hairs.

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

olivaceous brown to reddish or purplish brown, angulately reniform-ovoid, 2.8–3.8 mm, glabrous.

= 72.