Flora of North America species comparison

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

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

blade oblanceolate or sometimes narrowly elliptic, 1-veined from base, 1.8-7.5 × 0.8-3.3 cm, thin and flexible, base long-attenuate, margins plane, toothed, each with 3-12 teeth 0-1 mm high tipped with bristles to 0.2-1.2 × 0.1-0.15 mm, apex rounded or rounded-obtuse;

surfaces abaxially dull, smooth, adaxially dull, ± glaucous.

3-foliolate;

petioles 1.5-5 cm.

blades thick and rigid;

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

terminal leaflet sessile, blade 2.9-5.4 × 2.2-3.2 cm, 1.3-2.4 times as long as wide;

lateral leaflet blades ovate or rhombic to lanceolate, 1-3-veined from base, base acute to rounded-obtuse, margins plane or undulate, lobed, with 1-2 teeth 5-13 mm high tipped with spines to 2-3.4 × 0.3-0.4 mm, apex acuminate.

present, simple or 3(-7)-fid.

absent.

racemose, lax, 3-12-flowered, 2-5.5 cm;

bracteoles membranous, apex acuminate.

racemose, rather dense, 6-11-flowered, 1.5-2.5 cm;

bracteoles membranous, apex acute or obtuse.

anther filaments without distal pair of recurved lateral teeth.

anther filaments with distal pair of recurved lateral teeth.

red, oblong-ellipsoid, 10 mm, juicy, solid.

blue-black, glaucous, spheric to short-ovoid, 5-6 mm, juicy, solid.

scales 1-1.5 mm, deciduous.

scales 1.5-3 mm, deciduous.

= 28.