Flora of North America species comparison

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

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

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, linear, 7 mm, subequal to petiole;

petiole 3–10 mm, 1/5 times length of blade, densely stellate-hairy distally;

blade broadly elliptic to subrhombic, to 5.5 cm, 2–3.5 times longer than wide, smaller and narrower upward, base truncate to rounded, margins dentate almost to base, apex acute, surfaces evenly stellate-hairy, densely so abaxially.

axillary solitary or 2–4 clustered flowers.

usually axillary solitary flowers.

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

slender, to 2 cm, usually 3+ times longer than calyx, 2 times as long as 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, 6–7 mm, stellate-hairy, lobes triangular;

petals cream or pale yellow with reddish spot at base, 10 mm;

staminal column glabrous;

style 11-branched.

subconic, 4–5 mm diam., hairy;

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

oblate-conic, 5–6 mm diam., subglabrous apically;

mericarps 11, 4–5 mm, dorsal wall somewhat sunken, lateral walls smooth to obscurely reticulate, apex short-apiculate, with few antrorse hairs.

= 14, 28.

= 14.