Flora of North America species comparison

of 2d-year stems grayish brown, glabrous.

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

(3-)5-13-foliolate;

petioles 0.5-4.5(-7.5) cm.

3-foliolate;

petioles 1.5-5 cm.

blades thin and ± rigid or flexible;

surfaces abaxially glossy, smooth, adaxially glossy, green;

terminal leaflet stalked, blade 2.6-6.2 × 2-4.5 cm, 1.3-1.9 times as long as wide;

lateral leaflet blades elliptic to ovate or broadly lanceolate, 1(-3)-veined from base, base broadly obtuse, truncate, or weakly cordate, margins plane to crispate, toothed, each with 5-22 teeth 0-2 mm tipped with spines to 1-3 × 0.1-0.3 mm, apex acute to rounded-obtuse.

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.

absent.

absent.

racemose, dense, 25-50-flowered, 2-9 cm;

bracteoles membranous, apex rounded to broadly acute, sometimes apiculate.

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

bracteoles membranous, apex acute or obtuse.

anther filaments with distal pair of recurved lateral teeth.

blue, glaucous, oblong-ovoid to subspheric, 6-7 mm, juicy, solid.

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

scales 3-7 mm, deciduous.

scales 1.5-3 mm, deciduous.

filaments with distal pair of recurved lateral teeth.