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.

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 subulate to narrowly triangular, 3–14 mm;

petiole below inflorescence 1/2–1 1/2 blade, fine, curved hairs absent or obscured adaxially;

blade broadly to transversely ovate, 3–7-lobed, 6–20 × 6.5–22.5 cm below inflorescence, base deeply to shallowly cordate, lobes broadly triangular, margins subentire to coarsely crenate-dentate, apex broadly obtuse to long-acuminate, surfaces variably stellate-hairy, sometimes minutely so, nectary absent.

solitary flowers in axils of distal leaves.

solitary flowers, in axils of distal leaves or appearing subcorymbose by reduction of internodes and subtending leaves.

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

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

obscurely to conspicuously jointed distally, 2–12 cm, stellate- and glandular-hairy;

involucellar bractlets (6 or)7–11(or 12), often deciduous after anthesis, linear-subulate to narrowly triangular, 0.8–2.2 cm, margins not ciliate, stellate- and glandular-hairy Flowers horizontal or ascending, sometimes double;

calyx divided 1/2–2/3 length, campanulate, 1.6–4 cm, lobes triangular, apices acute to acuminate, stellate- and glandular-hairy, nectaries absent;

corolla broadly campanulate to rotate, petals usually opening white, changing to deep pink over course of day, rarely pink and unchanging, often with deep pink spot near base, ± obovate, (2.5–)4–7.5 × 1.2–7.5 cm, apical margins repand, usually undulate, finely hairy abaxially where exposed in bud;

staminal column straight, white to pink, 1.4–2.6 cm, bearing filaments nearly throughout, free portions of filaments not secund, 2.5–5 mm;

pollen cream to yellowish orange;

styles white to pink, 3–16 mm;

stigmas pink or yellow, rarely white.

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.

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, broadly ovoid or globose, 1–2.5 cm, apex impressed, strigose.

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

olivaceous to reddish brown or dark brown, reniform-ovoid, 2–2.8 mm, laterally glabrous, dorsally and dorsolaterally bearing long, straight, light brown to white, simple or 2- or 3-armed hairs.

= 84, 88, 92, 100, 110, 120 (all cultivars).