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.

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.

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 divided to ± middle, broadly campanulate, 2.9–6 cm, larger in fruit, lobes triangular, apices acute to subcaudate, velvety-hairy, nectaries absent;

corolla broadly to narrowly funnelform, petals pale pink to white, red basally, narrowly obovate, usually not conspicuously overlapping, 8.5–14 × 4–8.5 cm, apical margins repand, finely hairy abaxially where exposed in bud;

staminal column straight, pink to white, 6.2–9.5 cm, length 2/3 petals, bearing filaments throughout its length, free portion of filaments secund, 3–9 mm;

pollen yellow;

styles white, 7–17 mm;

stigmas yellow.

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.

light to dark brown, ovoid to subglobose, 2.2–3.5 cm, apex apiculate, hispid with simple, yellowish-brown to reddish-brown hairs.

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

brown to reddish brown, reniform-globose, 2.8–3.1 mm, verrucose-papillose.

= 38.