Flora of North America species comparison

of 2d-year stems gray or grayish purple, glabrous.

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

3-foliolate;

petioles 0.8-5.4 cm.

5-9-foliolate;

petioles 1-6 cm.

blades thick and rigid;

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

terminal leaflet sessile, blade 2.3-5.8 × 0.9-2 cm, 1.6-3.1 times as long as wide;

lateral leaflet blades narrowly lanceolate or narrowly elliptic, 1-veined from base, base acute or acuminate, rarely rounded-acute, margins plane, toothed or lobed, with 1-3 teeth or lobes 3-7 mm high tipped with spines to 1-2 × 0.2-0.3 mm, apex narrowly acute or acuminate.

blades thin and flexible or rather rigid;

surfaces abaxially glossy, smooth, adaxially glossy, green;

terminal leaflet stalked, blade 5.1-8.7(-14.5) × 2.4-4.5(-5.5) cm, 1.7-2.5 times as long as wide;

lateral leaflet blades lance-ovate to lance-elliptic, 1(-3)-veined from base, base obtuse or truncate, rarely weakly cordate, margins plane or undulate, toothed, each with 5-21 teeth 0-2 mm tipped with spines to 0.8-2.2 × 0.2-0.3 mm, apex acute or sometimes obtuse or rounded.

absent.

absent.

racemose, lax, 1-8-flowered, 0.5-3 cm;

bracteoles membranous, apex acuminate.

racemose, dense, 30-60-flowered, 3-9(-11) cm;

bracteoles membranous, apex rounded or obtuse, sometimes apiculate.

anther filaments without distal pair of recurved lateral teeth.

anther filaments with distal pair of recurved lateral teeth.

red, sometimes glaucous, spheric, 6-11 mm, juicy, solid.

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

scales 2-3 mm, deciduous.

scales 4-8(-14) mm, deciduous.

= 28, 56.