Flora of North America species comparison

stipules free from petiole, 1-veined, subulate, 5–6 mm, subequal to petiole;

petiole 5–7 mm, 1/10–1/4 length of blade, stellate-puberulent;

blade ± rhombic, 2.5–9 cm, smaller distally, 2–3(–4) times longer than wide, base usually cuneate, sometimes somewhat truncate to subcordate, margins serrate distally, entire basally, apex acute to subobtuse, surfaces stellate-puberulent or glabrescent 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 flowers.

axillary solitary flowers.

slender, (1–)3–4 cm, 4–6 times length of calyx, much shorter than to ± equaling subtending leaf, at least distalmost.

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

calyx ribbed, 5–6 mm, puberulent, lobes ovate;

petals yellow, 7–9 mm;

staminal column hairy;

style 10–14-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., glabrous;

mericarps 10–14, 3–4 mm, laterally reticulate, apex muticous to spined, sometimes 1-spined through failure of dehiscence, glabrous.

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