Flora of North America species comparison

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

erect to often reclining, glandular-puberulent, viscid and 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.

stipules free from petiole, 1-veined, subulate, 1–3 mm, shorter than petiole;

petiole 8–30 mm, 1/4–1/2 times length of blade, glandular-puberulent and with simple 1–2 mm hairs;

blade ovate, 3–6 cm, 1.5–2 times longer than wide, base cordate, margins serrate-crenate or dentate to base, apex acute, surfaces sparsely stellate-hairy.

axillary solitary or 2–4 clustered flowers.

axillary solitary flowers and 2–4-flowered fascicles, sometimes appearing paniculate.

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

jointed 2–5 mm below calyx, slender, 1–2 cm, longer than 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 mm, not beaked in bud, with both stellate and glandular hairs, lobes triangular, acute to short-acuminate;

petals white or yellow-orange, 5–6 mm;

staminal column hairy;

style 5-branched.

subconic, 4–5 mm diam., hairy;

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

subconic, 4–5 mm diam., puberulent;

mericarps 5, 2.5 mm, dorsally reticulate, apex spined, spines 1–2 mm, minutely antrorsely hairy.

= 14, 28.

= 16.