Flora of North America species comparison

biennial, erect-arching, sparsely to densely hairy, sparsely to abundantly stipitate-glandular, glands usually flattened to cupulate, not pruinose;

prickles sparse to dense, erect or slightly retrorse, stout, 4–10 mm, broad-based.

biennial, arching, sparsely to moderately hairy, long-stipitate-glandular, not pruinose;

prickles sparse to dense, erect to hooked, slender, 2–8(–10) mm, slender-based;

bristles dense, 2–6 mm, usually gland-tipped and reddish purple, glands ellipsoid to narrowly cup-shaped.

deciduous, palmately compound, not lustrous;

stipules filiform to narrowly lanceolate, (2–)5–15(–20) mm;

leaflets (3–)5(–7), terminal ovate to lanceolate, 7–16 × 4–9 cm, base rounded to shallowly cordate, unlobed, margins finely to coarsely serrate or doubly serrate, apex acuminate to long-attenuate, abaxial surfaces with hooked prickles on midveins, moderately hairy, moderately to densely stipitate-glandular on veins.

deciduous, ternate;

stipules filiform, 5–12 mm;

terminal leaflets broadly deltate or ovate to suborbiculate, 4–15 × 3.5–14 cm, base truncate, rounded, or shallowly cordate, unlobed or dentate to shallowly, sharply or bluntly 3-lobed, margins coarsely serrate or doubly serrate, apex acute to acuminate, abaxial surfaces with scattered, erect to curved prickles on moderate- to large-sized veins, densely white-hairy, moderately to densely long-stipitate-glandular along veins.

terminal on short shoots, sometimes appearing axillary, (5–)15–25-flowered, racemiform, often elongate.

terminal and axillary, 5–30-flowered, cymiform to racemiform.

unarmed or prickles sparse, hooked, densely hairy, densely short- to long-stipitate-glandular.

usually unarmed or prickles sparse, erect, moderately to densely hairy, densely long-stipitate-glandular.

bisexual;

petals white, obovate to elliptic, rarely suborbiculate, 8–20 mm;

filaments filiform;

ovaries glabrous or glabrate.

bisexual;

petals white to pink, ovate to suborbiculate, 4–6 mm;

filaments laminar;

ovaries glabrous.

black, globose to cylindric, 1–2 cm;

drupelets 20–100, strongly coherent, separating with torus attached.

red to maroon, globose, 1–1.5 cm;

drupelets 15–40, strongly coherent, separating from torus.

= 14, 21, 28.

= 14.