Flora of North America species comparison

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

erect or reclining, with simple 1.5–3 mm hairs mixed with shorter stellate hairs, rarely only stellate-hairy.

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, 1-veined, subulate, 2–5 mm;

petiole 10–30 mm, 1/4–1/2 (to nearly equaling) blade length, pubescence like stem;

blade ovate to triangular, 4–9 cm, 1.5–2 times longer than wide, base cordate, margins crenate-serrate or coarsely serrate to base, apex acuminate or attenuate, surfaces sparsely pubescent, abaxial surface stellate-pubescent, adaxial surface stellate-pubescent or with simple, often antrorsely-oriented hairs.

axillary solitary or 2–4 clustered flowers.

axillary, dense, subsessile, 3–8- glabrous or nearly so;

mericarps 5, 3 × 1.5 mm, laterally faintly striate to smooth, apex muticous.

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.

subconic, 4–5 mm diam., hairy;

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

= 14, 28.

= 32.