Flora of North America species comparison

stipules free from petiole, 1-veined, linear, 5–8 mm, shorter than petiole;

petiole 10–25 mm, to 1/2 length of blade, stellate-tomentose;

blade broadly cordate to ovate-lanceolate, to 6 cm, reduced distally, 1–2 times longer than wide, base cordate, margins dentate to base, apex acute, surfaces softly velvety-tomentose.

stipules free from petiole, 1-veined, linear, 3–6 mm, subequal to petiole;

petiole 2–5 mm, ca. 1/4 length of blade, glabrescent;

blade lanceolate-elliptic to round, 1.5–5 cm, somewhat longer than wide, base truncate, margins dentate apically, entire basally, apex acute or obtuse, surfaces minutely hairy.

axillary, usually subsessile, crowded panicles or corymbs, sometimes solitary flowers.

axillary solitary subsessile flowers.

0.2–0.4 cm, enlarging slightly in fruit, shorter than calyx.

not slender, 0.4–1.2 cm, usually shorter than calyx.

calyx prominently ribbed, 6–7 mm, densely stellate-tomentose, lobes ovate;

petals yellow-orange, often with darker reddish base, 8–11 mm;

staminal column hairy;

style 8–14-branched.

calyx ribbed, 5–8 mm, glabrescent, lobes acute or acuminate;

petals yellow, 6–8 mm;

style 8–10-branched.

oblate-conic, 6–7 mm diam., apically hairy;

mericarps 8–14, 4–5 mm, dorsally smooth, apex spined, spines to 2 mm, retrorsely barbed (variably developed, rarely suppressed).

subconic, 5–6 mm diam., glabrous;

mericarps 8–10, laterally reticulate, apex spined, spines to 1.5 mm, puberulent.

= 28.