Flora of North America species comparison

decumbent to erect, glabrous or sparsely short-hairy, eglandular or sparsely stipitate-glandular, not pruinose.

biennial, arching, sometimes creeping, glabrate to moderately hairy, sparsely to densely sessile- to short-stipitate-glandular, not or weakly pruinose;

prickles moderately dense to dense, suberect to retrorse or hooked, stout, 2–8 mm, broad-based.

deciduous, simple;

stipules lanceolate to narrowly ovate, 5–8(–14) mm;

blade orbiculate to reniform, (1.5–)2–4(–5) × (2.5–)3–4.5(–7) cm, base shallowly cordate, 3–5(–7)-lobed, lobe apices broadly rounded to obtuse, margins doubly dentate, abaxial surfaces sparsely hairy, mostly along veins, sparsely stipitate-glandular.

evergreen to late-deciduous, ternate or palmately compound;

stipules filiform, 5–15 mm;

leaflets 3–5, terminal ovate to elliptic, 6–12 × 7–12 cm, base rounded to cordate, usually deeply, rarely shallowly, lobed, margins coarsely serrate to doubly serrate, apex acuminate to short-attenuate, abaxial surfaces with hooked prickles primarily on midvein, moderately to densely hairy, eglandular or moderately sessile- to short-stipitate-glandular primarily on midvein.

1-flowered.

terminal, 5–25-flowered, thyrsiform.

pubescent, sparsely to densely short- to long-stipitate-glandular.

prickles moderate to dense, erect to reflexed, densely hairy, moderately to densely sessile- to short-stipitate-glandular.

bisexual;

petals white, obovate to ovate, 15–25(–30) mm;

filaments filiform;

ovaries glabrous, styles clavate, villous.

bisexual;

petals white to pink, elliptic to obovate, 8–15 mm;

filaments filiform;

ovaries usually apically hairy.

dark purple, hemispheric, to 1 cm;

drupelets 10–40, coherent, separating from torus.

black, globose to subcylindric, 1–1.5 cm;

drupelets 25–60, strongly coherent, separating with torus attached.

= 14, 21.

= 28.