Flora of North America species comparison

erect, puberulent to glabrate.

stipules free from petiole, 1-veined, subulate, 5–8 mm, subequal to petiole;

petiole 2–9 mm, much shorter than blade, minutely puberulent to glabrate;

blade narrowly linear to narrowly elliptic, 2–8 cm, 4–20 times longer than wide, base truncate, margins dentate to base, apex acute, surfaces minutely hairy abaxially, glabrous adaxially.

stipules free from pedicel, filiform to linear, often curved or twisted, 4–9 mm, subequal to corresponding petiole;

petiole 4–7 mm, ca. 1/10 length of blade, sparsely stellate-hairy;

blade lanceolate-elliptic to subrhombic, 5–9 cm, 4–7 times longer than wide, base cuneate, margins crenulate-serrate to base, apex acute, surfaces sparsely stellate-hairy abaxially, glabrescent adaxially.

axillary solitary flowers, scattered along stem, little, if at all, apically congested.

axillary solitary flowers, often congested apically.

slender, 0.5–4 cm, longer than calyx.

unarticulated, 0.5–1 cm, shorter than subtending leaf, shorter than or subequal to calyx.

calyx ribbed, 6–9 mm, basally hairy, lobes ovate;

petals yellow-orange, 12–15 mm;

staminal column sparsely and minutely hairy;

style 8–11-branched.

calyx ribbed, 7–9 mm, glabrous, lobes trullate;

petals yellow, 15 mm;

staminal column hairy;

style 9–12-branched.

oblate, 6–8 mm diam., sparsely hairy apically, otherwise glabrous;

mericarps 8–11, 3 mm, laterally reticulate, apex blunt to spinose, spines 0.2–1 mm.

oblate, 6–7 mm diam., apically hairy;

mericarps 9–12, 5 mm, laterally reticulate, apex spined, spines 1.5–2 mm.