Flora of North America species comparison

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

procumbent, stellate-hairy, hairs multirayed, usually also with simple 1–2 mm hairs.

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.

distributed evenly along stems;

stipules inconspicuous, free from petiole, subulate, 1.5–3 mm;

petiole 5–15 mm, 1/2 to equaling or exceeding blade, often with simple 1–2 mm hairs;

blade ovate to oblong, to 1.5+ cm, 1.5–3 times longer than wide, base cordate, margins crenate to base, apex obtuse to acute, surfaces hairy.

axillary solitary or 2–4 clustered flowers.

axillary solitary flowers.

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

slender, 1–2.5 cm, 2–5 times as long as calyx.

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

petals yellow, rarely white, 5 mm;

staminal column glabrous;

style 5-branched.

calyx angulate, 4–5(–7) mm, hirsute, lobes ovate-acuminate;

petals white, 5–6 (–10) mm;

staminal column puberulent;

style 5-branched.

subconic, 4–5 mm diam., hairy;

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

conic, 4 mm diam., hairy;

mericarps 5, 2–3 mm, basal portion slightly rugose, apex spined, spines 0.1–0.5 mm, antrorsely hairy.

= 14, 28.

= 14