Flora of North America species comparison

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

of 2d-year stems grayish or purplish brown, 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-)5-7-foliolate;

petioles (1-)3-9 cm.

blades thin and flexible;

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

terminal leaflet stalked, blade 3.2-9.5 × 2.3-6 cm, 1.2-2.2(-2.5) times as long as wide;

lateral leaflets ovate or elliptic, 1(-3)-veined from base, base rounded to obtuse or truncate, margins plane, toothed, with 6-24 teeth 0.5-3 mm tipped with spines to 0.6-2.8 × 0.1-0.25 mm, apex rounded, rarely obtuse or even broadly acute.

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

absent.

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

bracteoles membranous, apex acuminate.

racemose, dense, 25-50-flowered, 3-10 cm;

bracteoles membranous, apex rounded to obtuse or broadly acute.

anther filaments without distal pair of recurved lateral teeth.

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

blue, glaucous, oblong-ovoid, 6-10 mm, juicy, solid.

scales 1-1.5 mm, deciduous.

scales 3-8 mm, deciduous.

filaments with distal pair of recurved lateral teeth.

= 28.

= 28.