Flora of North America species comparison

monomorphic, without short axillary shoots.

usually monomorphic, seldom with short axillary shoots.

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

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

9-21-foliolate;

petioles 2-11 cm.

5-7-foliolate;

petioles 0.5-3 cm.

blades thin and ± flexible;

surfaces abaxially rather dull, smooth, adaxially dull, somewhat glaucous;

terminal leaflet stalked, blade 2.9-8.4 × 1.2-4.8 cm, 1.8-3.2 times as long as wide;

lateral leaflet blades lance-ovate to ovate, 4-6-veined from base, base rounded to cordate, margins plane, toothed, each with 6-13 teeth 1-2(-3) mm tipped with spines to 1-2.4 × 0.1-0.2 mm, apex acute or broadly acuminate.

blades thick and rigid;

surfaces abaxially dull, papillose, adaxially dull, glaucous;

terminal leaflet stalked, rarely sessile in a few leaves, blades 2.2-8.8 × 1.8-6 cm, 1.2-2 times as long as wide;

lateral leaflet blades elliptic to oblong or oblong-ovate, 1-3-veined from base, base obtuse or truncate, margins strongly crispate, toothed, each with 3-8 teeth 2-8 mm tipped with spines to 2-4.8 × 0.4-0.6 mm, apex rounded or obtuse.

absent.

absent.

racemose, dense, 30-70-flowered, 6-17 cm;

bracteoles membranous, apex acute, obtuse, or rounded.

racemose, dense, 25-50-flowered, 3-7 cm;

bracteoles membranous, apex rounded or obtuse.

anther filaments without distal pair of recurved lateral teeth.

anther filaments with distal pair of recurved lateral teeth.

blue, glaucous, oblong-ovoid or globose, 8-11 mm, juicy, solid.

dark blue, at least sometimes glaucous, oblong-ovoid, 6-7 mm, juicy, solid.

scales (13-)20-44 mm, persistent.

scales 3-5 mm, deciduous.

= 56.

= 28.