Flora of North America species comparison

also with line of fine, curved hairs.

stipules linear-lanceolate, 10–16 mm, ciliate;

petiole mostly 2/3 to equaling blade, with fine, curved hairs adaxially, sometimes sparingly prickly;

blade broadly to transversely triangular-ovate, mostly 5-fid, 4.5–15 × 6–17 cm, base truncate or broadly and shallowly cordate, margins serrate, apex acuminate, segments lanceolate, surfaces glabrous but veins sometimes with retrorse prickles abaxially, nectary sometimes present abaxially on midvein near base.

solitary flowers in axils of distal leaves.

jointed near middle, to 1.5 cm, prickly distal to joint;

involucellar bractlets 8–10, flattened or canaliculate, 1–1.8 cm, margins setose, apex simple, 2-fid, or appendaged, spreading in flower to reflexed in fruit.

horizontal or ascending;

calyx divided 2/3+ length, cylindric-campanulate, 1.5–2.5 cm, accrescent, lobes narrowly triangular, with 3 prominent, setose ribs, 2 marginal, 1 medial, these often darker and with stinging bristly hairs, apices acuminate-attenuate, nectary absent;

corolla rotate, petals usually dark red to rose-purple, rarely yellow, with dark purple basally, asymmetrically obovate, 3.5–7 × 3–5.5 cm, margins repand, finely hairy abaxially where exposed in bud;

staminal column straight, maroon, 2.4–3.5 cm, bearing filaments nearly throughout, free portion of filaments not secund, mostly 1.5–2.5 mm;

pollen dull yellow;

styles maroon, 1.5–3 mm;

stigmas dark maroon.

pinkish brown, ovoid, 1.8–2.5 cm, apex acute, apiculate, antrorsely hispid, hairs readily deciduous, simple.

dark olivaceous, with fine, raised, concentric lines, angulately reniform-ovoid, 4.2–4.8 mm, moderately verrucose-lepidote, scales striate-fimbriate.

= 72 (Trinidad, where cultivated).