Flora of North America species comparison

densely to sparsely stellate-hairy, hairs to 0.5 mm.

minutely hairy to glabrate, hairs minute, recurved, often in well-defined longitudinal rows.

stipules subulate, 2–5 mm;

petiole 1/2–1 times length of blade;

blade slightly discolorous, ovate, 2–5 cm, slightly longer than wide, base cordate, margins coarsely dentate, apex acute, surfaces stellate-hairy.

stipules subulate to filiform, 5–10 mm;

petiole to 1/3 length of blade;

blade concolorous, ovate, 4–12 cm, base truncate to subcordate, margins irregularly dentate, apex acute, surfaces sparsely hairy to glabrate.

axillary solitary flowers.

axillary solitary flowers.

2–5 cm, usually subequal to petiole;

involucellar bractlets 5, alternate with calyx lobes, usually linear-lanceolate, 1–2 mm wide, shorter than to subequal to calyx, hirsute.

1–3 cm, somewhat longer than petiole;

involucellar bractlets 5–7, not alternate with calyx lobes, ligulate or slightly spatulate, 10–12 × 1 mm, subequal to calyx, ciliate.

calyx 9–12 mm, hirsute, lobes prominently 3–5-veined;

corolla rotate, petals lavender to pink, not auriculate, 15–25 mm;

staminal column usually declinate resulting in somewhat bilateral flower, with 5 apical teeth, glabrous;

stigmas included, usually villous.

calyx 8–11 mm, ciliate, hairs 1–2 mm;

petals yellow, auriculate, 20–25 mm;

staminal column with 5 apical teeth;

stigmas exserted.

tufted on hilum.

not tufted on hilum.

pallid, 8–9 mm diam., subglabrous;

mericarps pale brown, without spines, obscurely carinate dorsally, otherwise smoothly rounded, 3.5–4 mm.

pallid, 8–10 mm diam., rugose;

mericarps 3-spined, spines 6–7 mm, retrorsely barbed, central spine erect, lateral spines divergent.