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.

with line of fine, curved hairs.

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, (8–)10–15 mm;

petiole 1/2 to ± equaling blade, with fine, curved hairs adaxially;

blade usually dark red, broadly to transversely ovate, usually deeply 3–5-lobed, 4–10 × 3.5–10 cm, base broadly cuneate to truncate, margins crenate or crenate-serrate, apex acute to acuminate, lobes narrowly elliptic or narrowly obovate, surfaces glabrate, prominent slitlike nectary present abaxially on midvein near base.

solitary flowers in axils of distal leaves.

solitary flowers in axils of distal leaves, sometimes together 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 near middle, to 1.2 cm;

involucellar bractlets 8–10, terete, 0.6–1.6 cm, margins setose, apices 2-fid or appendaged.

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;

calyx divided nearly 2/3 length, funnelform-campanulate, 1.2–2 cm, lobes triangular, with 3 prominent ribs, 2 marginal, 1 medial, medial bearing nectary, apices acuminate, veins setose with pustular-based, simple hairs;

corolla funnelform-rotate, petals cream, yellow, or dull pink to dull red with veins usually darker pink, maroon basally, asymmetrically obovate, 3–5.5 × 2.5–4.5 cm, margins repand, finely hairy abaxially where exposed in bud;

staminal column straight, maroon, 1.5–2.5 cm, bearing filaments nearly throughout, free portion of filaments not secund, 1.5–2.5 mm;

pollen yellow;

styles maroon, to 1 mm;

stigmas 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.

reddish brown, ovoid, 1.6–2.5 cm, apex acute or short-acuminate, weakly antrorsely hispid with simple, scattered, loose hairs.

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

olivaceous brown, angulately reniform-ovoid, 3.5–4 mm, papillose-scaly, scales pectinate.

= 72.