Flora of North America species comparison

of 2d-year stems brown, densely tomentose.

of 2d-year stems grayish or purplish brown, glabrous.

blade obovate, 1-veined from base, 1.7-3 × 0.9-1.2 cm, thick and rigid, base acute or acuminate, margins reflexed, undulate, toothed or shallowly lobed, each with 2-4 teeth or lobes 1-3 mm high tipped with spines to 1.2-1.6 × 0.2-0.3 mm, apex obtuse or rounded;

surfaces abaxially glossy, smooth, adaxially glossy, green.

(3-)5-7-foliolate;

petioles (1-)3-9 cm.

blades thin and flexible;

surfaces abaxially dull, papillose, adaxially dull, rarely glossy, somewhat glaucous;

terminal leaflet stalked, blade 3.2-9.5 × 2.3-6 cm, 1.2-2.2(-2.5) times as long as wide;

lateral leaflets ovate or elliptic, 1(-3)-veined from base, base rounded to obtuse or truncate, margins plane, toothed, with 6-24 teeth 0.5-3 mm tipped with spines to 0.6-2.8 × 0.1-0.25 mm, apex rounded, rarely obtuse or even broadly acute.

present, pedately 5-9-fid.

absent.

racemose, rather dense, 10-20-flowered, 3-4 cm;

bracteoles membranous, apex acuminate.

racemose, dense, 25-50-flowered, 3-10 cm;

bracteoles membranous, apex rounded to obtuse or broadly acute.

anther filaments without distal pair of recurved lateral teeth.

dark purple, spheric, 6-7 mm, juicy, solid.

blue, glaucous, oblong-ovoid, 6-10 mm, juicy, solid.

scales 2-4 mm, deciduous.

scales 3-8 mm, deciduous.

filaments with distal pair of recurved lateral teeth.

= 28.