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.

erect to arching, glabrate or sparsely to densely hairy, eglandular or sparsely short-stipitate-glandular, rarely densely long-stipitate-glandular, not pruinose;

bark usually papery with age, peeling (especially toward base);

prickles absent or sparse to dense, erect, slender, 1–5 mm, broad- to narrow-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, ternate;

stipules filiform to linear, 3–10 mm;

terminal leaflets ovate, 4–15 × 3.5–15 cm, base truncate, rounded to shallowly cordate, shallowly, sharply lobed, margins coarsely serrate to doubly serrate, apex acute to acuminate, abaxial surfaces unarmed or with erect prickles on midvein, moderately to densely hairy, eglandular, rarely stipitate-glandular along midvein.

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

terminal and axillary, 1–2-flowered.

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

unarmed or prickles sparse, erect, moderately to densely hairy, eglandular, rarely short-stipitate-glandular.

bisexual;

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

filaments filiform;

ovaries glabrous.

bisexual;

petals pink to magenta, broadly to narrowly obovate, 10–30 mm;

filaments laminar;

ovaries glabrous.

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

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

yellow, orange, or red, globose to ovoid, 1–2 cm;

drupelets 20–80, strongly coherent, separating from torus.

= 14.

= 14.