Flora of North America species comparison

biennial, erect, then arching, usually moderately, rarely sparsely, hairy hairs stellate, eglandular, strongly pruinose;

prickles absent or sparse to dense, erect to hooked, stout, 3–10 mm, broad-based.

biennial, erect, primocanes and floricanes later over-arching, glabrous or sparsely puberulent, eglandular, strongly pruinose;

prickles sometimes sparse, erect or hooked, narrow to stout, 4–8 mm, narrow- to broad-based.

persistent or nearly so, ternate to palmately compound;

stipules filiform to linear, 4–12 mm;

leaflets 3–5, terminal ovate, elliptic, or suborbiculate to obovate, 4–10 × 2–6(–9) cm, base rounded to cuneate, unlobed, margins finely to moderately serrate, apex acute or acuminate to attenuate, abaxial surfaces with hooked prickles on larger veins, densely white short-velutinous, hairs usually minute, eglandular.

deciduous, ternate or palmately compound;

stipules filiform, 5–10 mm;

petiole usually armed with prickles;

petiolules of terminal leaflets also sometimes armed;

lateral leaflets sessile or subsessile;

leaflets 3(–5), terminal ovate to lanceolate, 5–14 × 3–11 cm, base rounded to cordate, unlobed or laterals sometimes lobed, margins finely to doubly serrate, apex acute, abaxial surfaces sometimes with hooked prickles on midveins, densely white-canescent to tomentose, eglandular.

terminal, 10–60-flowered, paniculiform or thyrsiform.

(2–)3–7(–20)-flowered, cymiform or umbelliform.

unarmed or prickles moderate to dense, erect to hooked, densely short-hairy, eglandular.

prickles erect, hooked, puberulent to pubescent, eglandular.

bisexual;

petals usually pink, sometimes white, obovate or elliptic to suborbiculate, 5–12 mm;

filaments filiform;

ovaries apically hairy.

bisexual;

petals initially erect, later ascending, white, narrowly obovate to elliptic, 5–10 mm, apex sometimes emarginate;

filaments laminar;

ovaries tomentose.

black, globose to ovoid, 1–1.5 cm;

drupelets 10–40, strongly coherent, separating with torus attached.

usually dark purplish to black, rarely amber, pruinose, aromatic, depressed-globose, 1–1.5 cm;

drupelets 20–50, coherent, separating from torus.

= 14.

= 14.