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.

usually creeping, ± woody basally, sparsely to densely hairy, eglandular, not pruinose;

prickles absent or sparse, erect, weak, 1–3 mm, 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 free from petioles, lanceolate to ovate or elliptic, 6–11 mm;

petiole 2–11 cm;

petiolule of terminal leaflet 8–20 mm;

lateral leaflet sessile or subsessile;

terminal leaflets ovate to elliptic, 4–8 × 3–7 cm, base tapered, unlobed, lateral leaflets sometimes shallowly lobed, margins coarsely doubly serrate, apex acute, abaxial surfaces unarmed, sparsely hairy, eglandular.

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

axillary, 1–6-flowered, cymiform or umbelliform.

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

unarmed or prickles weak, erect, hairy, eglandular or sparsely stipitate-glandular.

bisexual;

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

filaments filiform;

ovaries glabrous.

bisexual;

petals greenish white, narrowly obovate, 5.5–7 mm;

filaments laminar;

ovaries glabrous.

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

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

red, globose, 0.5–1.5 cm;

drupelets 1–10, not or weakly coherent, separating with torus attached.

= 14.

= 28.