Flora of North America species comparison

biennial, erect to arching, rarely creeping, not node- or tip-rooting, sparsely to moderately hairy, sparsely to densely long-, rarely short-stipitate-glandular, glands rounded to flattened, not pruinose;

prickles absent or sparsely to moderately dense, erect to retrorse, weak, slender, 1–3(–5) mm, narrow-based;

bristles sparse to dense, erect to retrorse, green to reddish, narrow, semirigid, sometimes flexible, not gland-tipped.

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

prickles absent or sparse, erect, weak, 1–3 mm, narrow-based.

deciduous, ternate or palmately compound, sometimes ± lustrous;

stipules filiform to lanceolate, 5–20(–38) mm;

leaflets (3–)5, terminal obovate or elliptic to rhombic, 4.5–11.5 × 2–7 cm, base cuneate to narrowly rounded, unlobed, margins moderately, coarsely serrate to doubly serrate or serrate-dentate, apex acute or acuminate to short-attenuate, abaxial surfaces unarmed or with bristles on midvein, sparsely to moderately hairy, eglandular or sparsely to moderately sessile- to long-stipitate-glandular along larger veins.

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, sometimes appearing axillary, 5–15(–20)-flowered, racemiform, cymiform, or thyrsiform.

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

prickles or bristles sparse to dense, erect to retrorse, moderately to densely hairy, moderately to densely stipitate-glandular.

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

bisexual;

petals white, obovate to oblanceolate, 6–13 mm;

filaments filiform;

ovaries glabrous.

bisexual;

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

filaments laminar;

ovaries glabrous.

black, globose, 0.7–1.5 cm;

drupelets 5–25, 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, 21, 28, 35.

= 28.