Flora of North America species comparison

erect, minutely stellate-hairy, hairs to 0.5 mm.

erect, minutely stellate-hairy when young, soon glabrate.

stipules free from petiole, 1-veined, subulate, 3–6 mm, 1/2 as long as petiole;

petiole 5–15 mm, usually 1/4–1/2 length of blade, sometimes shorter, minutely stellate-hairy, hairs to 0.5 mm, usually with small spinelike tubercle on stem just below its attachment;

blade ovate, lanceolate, or narrowly oblong, 2–6 cm, smaller apically, 2–5 times longer than wide, base subcordate, margins crenate-serrate to base, apex usually acute, surfaces stellate-tomentulose abaxially, glabrate adaxially.

stipules free from petiole, linear-lanceolate, 3–4 mm, shorter than petiole;

petiole to 0.9 mm, shorter than blade, glabrous;

blade palmately 5–7-lobed, maplelike, to 24 cm, ± as long as wide, smaller upward, base cordate, margins serrate, apex long-acuminate, surfaces glabrous.

axillary solitary or 2–4 clustered flowers.

axillary, subumbellate, 2–10-flowered pedunculate corymbs, forming terminal panicles.

0.5–1 cm, subequal to calyx and subtending petiole.

calyx angulate, 5–7 mm, minutely tomentose, lobes triangular;

petals yellow, rarely white, 5 mm;

staminal column glabrous;

style 5-branched.

calyx dark-pigmented basally, unribbed, not angulate, 4–5 mm, minutely stellate-hairy, lobes wide-triangular;

petals white, 8–10 mm;

staminal column hairy;

style 8-branched.

subconic, 4–5 mm diam., hairy;

mericarps 5, 3–4 mm, somewhat rugose, apex spined, spines 1 mm, antrorsely hairy.

subconic, 6–8 mm diam., minutely stellate-hairy;

mericarps 8, not reticulate, apex beaked.

= 14, 28.

= 28.