Flora of North America species comparison

monomorphic, without short axillary shoots.

dimorphic, with short axillary shoots.

of 2d-year stems brown or yellow-brown, glabrous.

of 2d-year stems purple or brown, glabrous.

9-21-foliolate;

petioles 2-11 cm.

blade obovate to spatulate, 1-veined from base, (0.5-)1.2-2.4 × 0.3-1(-1.8) cm, thin and flexible, base long-attenuate, margins plane, entire, apex rounded or obtuse;

surfaces abaxially dull, smooth, adaxially dull, scarcely glaucous.

blades thin and ± flexible;

surfaces abaxially rather dull, smooth, adaxially dull, somewhat glaucous;

terminal leaflet stalked, blade 2.9-8.4 × 1.2-4.8 cm, 1.8-3.2 times as long as wide;

lateral leaflet blades lance-ovate to ovate, 4-6-veined from base, base rounded to cordate, margins plane, toothed, each with 6-13 teeth 1-2(-3) mm tipped with spines to 1-2.4 × 0.1-0.2 mm, apex acute or broadly acuminate.

absent.

present, simple or 3-fid.

racemose, dense, 30-70-flowered, 6-17 cm;

bracteoles membranous, apex acute, obtuse, or rounded.

umbellate, 1-5-flowered, 1-1.5 cm;

bracteoles membranous, apex acute.

anther filaments without distal pair of recurved lateral teeth.

anther filaments without distal pair of recurved lateral teeth.

blue, glaucous, oblong-ovoid or globose, 8-11 mm, juicy, solid.

red, ellipsoid or spheric, (7-)9-10 mm, juicy, solid.

scales (13-)20-44 mm, persistent.

scales 1-2 mm, deciduous.

= 56.