Flora of North America species comparison

of 2d-year stems brown, densely tomentose.

of 2d-year stems tan, 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.

5-9-foliolate;

petioles 2-8 cm.

blades thick and rigid;

surfaces abaxially smooth, shiny, adaxially dull, gray-green;

terminal leaflet stalked, blade 6.5-9.3 × 4-7 cm, 1.3-2.3 times as long as wide;

lateral leaflet blades ovate or lance-ovate, 4-6-veined from base, base truncate or weakly cordate, margins plane, toothed, with 2-7 teeth 3-8 mm tipped with spines to 1.4-4 × 0.3-0.6 mm, apex acuminate.

present, pedately 5-9-fid.

absent.

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

bracteoles membranous, apex acuminate.

racemose, dense, 70-150-flowered, 5-17 cm;

bracteoles ± corky, apex rounded to acute.

anther filaments without distal pair of recurved lateral teeth.

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

dark blue, glaucous, oblong-ovoid, 9-12 mm, juicy, solid.

scales 2-4 mm, deciduous.

scales 11-13 mm, persistent.