Flora of North America species comparison

puberulent, sometimes glabrescent.

usually villous-pubescent, sometimes glabrous.

blades broadly ovate, to 13 × 8 cm, margins usually sinuate-dentate, sometimes pinnately lobed, surfaces glabrescent.

blades ovate, to 22 × 16 cm, margins entire or irregularly sinuate-dentate, surfaces villous to glabrescent, (trichomes spreading, often more dense along veins, sometimes glandular).

calyx with minute pubescence along veins, tube cylindric, 5-toothed;

corolla white, trumpet-shaped, 4–6 cm, acuminate lobes alternating with sinuses.

calyx villous along veins, hairs spreading, tube cylindric, 5-toothed;

corolla white, sometimes lavender- or purple-tinged, funnelform, 10–22 cm, sparsely hairy, glabrescent, acuminate lobes alternating with lobules of similar size.

erect, dehiscent by 4 valves, pericarp dry, sparsely hairy, with prickles unequal, some 15+ mm, proximals shorter than distals;

calyx remnant not accrescent.

pendent, irregularly dehiscent, pericarp fleshy, hairy, with prickles 10 mm;

calyx remnant slightly accrescent.

black, 4–4.5 mm, convex marginal ridge absent, testa rugose;

caruncle absent.

brown, 4–6 mm, convex marginal ridge present, testa smooth;

caruncle present.

= 24.

= 24.