Flora of North America species comparison

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

erect, minutely 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.

distichous;

stipules free from petiole, 1–3(–5)-veined, broadly falcate, 6–12 mm, often exceeding petiole;

petiole (1–)4–5(–8) mm, ca. 1/10 blade length, obscurely stellate-hairy;

blade lanceolate to ovate, 3–9 cm, 2–4 times longer than wide, base cuneate to rounded, margins serrate at least distally, apex acute, surfaces hirsute to glabrate.

axillary solitary or 2–4 clustered flowers.

axillary solitary or paired flowers, sometimes more and subumbellate.

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

jointed near base, 0.2–0.5(–0.8) 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 ribbed, 6–8 mm, often ciliate, lobes triangular;

petals yellow, 7–10(–12) mm;

staminal column glabrous or hairy;

style 7–12-branched.

subconic, 4–5 mm diam., hairy;

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

subconic, 5–7 mm, glabrous;

mericarps 7–12, 3–4 mm, laterally reticulate, apex spined, spines to 0.5 mm.

= 14, 28.

= 28.