Flora of North America species comparison

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

of 2d-year stems purple, glabrous.

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.

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, simple or 3-fid.

absent.

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

bracteoles membranous, apex acute.

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.

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

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

scales 1-2 mm, deciduous.

scales 1.5-4 mm, deciduous.