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, erect, glabrescent, eglandular or stipitate-glandular, strongly pruinose;

prickles absent or sparse to dense, erect, weak, 1–4 mm, broad-based;

bristles present or absent.

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, pinnately compound;

stipules filiform, 5–10 mm;

petiole unarmed or with prickles, strigose or glabrous, glandular or eglandular;

terminal leaflets petiolulate, lateral sessile or subsessile;

leaflets 3–5(–7), terminal ovate to lanceolate, 7–15 × 4–11 cm, base rounded to cordate, unlobed or 2-lobed, margins serrate to doubly serrate, apex acute to attenuate, abaxial surfaces unarmed or with prickles, strongly white-tomentose, eglandular or glandular.

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

terminal and axillary, (1–)3–7(–20)-flowered, racemiform.

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

unarmed or prickles sparse, hooked, glabrous or sparsely pubescent, stipitate-glandular or eglandular.

bisexual;

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

filaments filiform;

ovaries glabrous.

bisexual;

petals white to greenish white, spatulate to obovate, 5–10 mm;

filaments filiform or slightly dilated basally;

ovaries pubescent.

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

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

usually red to whitish, rarely amber, globose to conic, 0.5–2 cm;

drupelets 10–60, coherent, separating from torus.

= 14.