Flora of North America species comparison

monomorphic, without short axillary shoots.

often ± dimorphic, with elongate primary and somewhat elongate axillary shoots.

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

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

9-21-foliolate;

petioles 2-11 cm.

3-foliolate;

petioles 1.5-5 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, 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, 30-70-flowered, 6-17 cm;

bracteoles membranous, apex acute, obtuse, or rounded.

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.

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

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

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

scales 1.5-3 mm, deciduous.

= 56.