Flora of North America species comparison

from rhizomes, erect, rarely woody basally, sparsely hairy, sparsely stipitate-glandular distally, not pruinose.

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.

deciduous, simple;

stipules broadly ovate to oblong, 3–6 mm;

blade reniform or orbiculate, 2.5–6 × (3–)5–8(–12) cm, base cordate, 3–7-lobed, lobe apices rounded, margins finely doubly serrate or dentate, abaxial surfaces sparsely hairy, sparsely to moderately stipitate-glandular along veins.

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.

1-flowered.

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

pubescent, sparsely to densely short- to long-stipitate-glandular.

prickles erect, hooked, puberulent to pubescent, eglandular.

unisexual;

petals white, obovate, (8–)10–15(–18) mm;

filaments filiform;

ovaries glabrous, styles filiform, glabrous.

bisexual;

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

filaments laminar;

ovaries tomentose.

golden yellow to orange or reddish, globose, 1.2–1.5 cm;

drupelets (5–)10–20, moderately coherent, separating from torus.

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

drupelets 20–50, coherent, separating from torus.

= 56.

= 14.