Flora of North America species comparison

of 2d-year stems brown, densely tomentose.

of 2d-year stems purple, 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 (basal pair of leaflets sometimes reduced to bristles);

petioles 0.1-0.5 cm.

blades thin or thick and rigid;

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

terminal leaflet stalked (sessile in a few leaves), blades 1.8-3.5 × 0.7-1.7 cm, 1.3-4.7 times as long as wide;

lateral leaflets oblong to elliptic or lanceolate, 1-veined from base, base truncate to obtuse, rarely acute, margins plane or undulate, toothed, each with 3-8 teeth 0.5-2 mm high tipped with spines to 0.6-1.2 × 0.1-0.2 mm, apex rounded to acuminate.

present, pedately 5-9-fid.

absent.

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

bracteoles membranous, apex acuminate.

racemose, lax, 2-6-flowered, 4-6 cm;

bracteoles leathery, apex spinose-acuminate, sometimes with proximal bracteoles as described, distal membranous and acuminate.

anther filaments without distal pair of recurved lateral teeth.

anther filaments with distal pair of recurved lateral teeth.

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

white or red and somewhat glaucous, spheric, 9-16 mm, dry or juicy, hollow.

scales 2-4 mm, deciduous.

scales 1.5-4 mm, deciduous.