Flora of North America species comparison

monomorphic, without short axillary shoots.

dimorphic, with elongate primary and short axillary shoots.

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

of 2d-year stems brown, densely tomentose.

9-21-foliolate;

petioles 2-11 cm.

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.

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, pedately 5-9-fid.

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

bracteoles membranous, apex acute, obtuse, or rounded.

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

bracteoles membranous, apex acuminate.

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.

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

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

scales 2-4 mm, deciduous.

= 56.