Flora of North America species comparison

biennial, initially low-arching, then falling and creeping (or climbing through other vegetation), glabrous or moderately hairy, sparsely to densely short- to long-stipitate-glandular, not pruinose;

prickles moderate to dense, recurved, sometimes distally slender, 1–4 mm, broad-based;

bristles absent or sparse to dense, erect to retrorse, red to purple, rarely green, slender, weak, gland-tipped.

biennial, arching, usually densely, sometimes moderately, hairy, usually eglandular, sometimes sessile- to short-stipitate-glandular, not pruinose;

prickles moderate to dense, recurved to erect, slender, 3–10 mm, broad-based.

persistent or semipersistent, ternate to palmately compound, lustrous;

stipules filiform, linear, or lanceolate, 2–12(–15) mm;

leaflets 3–5, terminal narrowly elliptic or ovate to obovate, 2–8.5 × 0.7–4.5 cm, base rounded to cuneate, unlobed, margins moderately to coarsely serrate to doubly serrate, apex acute to acuminate, abaxial surfaces with hooked prickles on midvein, glabrous or sparsely to moderately hairy, eglandular or sparsely short-stipitate-glandular along central vein.

deciduous or ± persistent, palmately compound;

stipules filiform to linear, 5–15 mm;

leaflets 3–5, terminal usually suborbiculate to orbiculate, sometimes broadly elliptic, 4–9 × 4–8 cm, base rounded to shallowly cordate, unlobed, margins moderately to coarsely serrate, apex acute to cuspidate, abaxial surfaces with hooked prickles on midvein, densely white-gray to gray-green tomentose, eglandular or obscurely short-stipitate- to sessile-glandular along midveins.

terminal on short shoots, usually appearing axillary, 1(–3)-flowered.

terminal, 7–35-flowered, cymiform or thyrsiform.

prickles and, often, bristles moderate to dense, recurved, moderately to densely hairy, sparsely to moderately sessile- to short-stipitate-glandular.

prickles moderate to dense, recurved to erect, densely hairy, moderately to densely stipitate-glandular.

bisexual;

petals white to pink, elliptic to obovate, 10–16(–25) mm;

filaments filiform;

ovaries glabrous.

bisexual;

petals pink to magenta, elliptic to suborbiculate, 6–12(–15) mm;

filaments filiform;

ovaries apically hairy.

black, globose to ovoid, 1–1.5(–2) cm;

drupelets 10–50, strongly coherent, separating with torus attached.

black, globose, 1–1.5 cm;

drupelets 15–40, coherent, separating with torus attached.

= 14.

= 28.