Flora of North America species comparison

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

biennial, arching, sparsely to moderately hairy, long-stipitate-glandular, not pruinose;

prickles sparse to dense, erect to hooked, slender, 2–8(–10) mm, slender-based;

bristles dense, 2–6 mm, usually gland-tipped and reddish purple, glands ellipsoid to narrowly cup-shaped.

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.

deciduous, ternate;

stipules filiform, 5–12 mm;

terminal leaflets broadly deltate or ovate to suborbiculate, 4–15 × 3.5–14 cm, base truncate, rounded, or shallowly cordate, unlobed or dentate to shallowly, sharply or bluntly 3-lobed, margins coarsely serrate or doubly serrate, apex acute to acuminate, abaxial surfaces with scattered, erect to curved prickles on moderate- to large-sized veins, densely white-hairy, moderately to densely long-stipitate-glandular along veins.

1-flowered.

terminal and axillary, 5–30-flowered, cymiform to racemiform.

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

usually unarmed or prickles sparse, erect, moderately to densely hairy, densely long-stipitate-glandular.

bisexual;

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

filaments filiform;

ovaries glabrous, styles clavate, villous.

bisexual;

petals white to pink, ovate to suborbiculate, 4–6 mm;

filaments laminar;

ovaries glabrous.

dark purple, hemispheric, to 1 cm;

drupelets 10–40, coherent, separating from torus.

red to maroon, globose, 1–1.5 cm;

drupelets 15–40, strongly coherent, separating from torus.

= 14, 21.

= 14.