Flora of North America species comparison

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

of 2d-year stems purple, glabrous.

3-foliolate;

petioles 0.8-5.4 cm.

5-9-foliolate (basal pair of leaflets sometimes reduced to bristles);

petioles 0.1-0.5 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 or thick and rigid;

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

terminal leaflet stalked (sessile in a few leaves), blades 1.8-3.5 × 0.7-1.7 cm, 1.3-4.7 times as long as wide;

lateral leaflets oblong to elliptic or lanceolate, 1-veined from base, base truncate to obtuse, rarely acute, margins plane or undulate, toothed, each with 3-8 teeth 0.5-2 mm high tipped with spines to 0.6-1.2 × 0.1-0.2 mm, apex rounded to acuminate.

absent.

absent.

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

bracteoles membranous, apex acuminate.

racemose, lax, 2-6-flowered, 4-6 cm;

bracteoles leathery, apex spinose-acuminate, sometimes with proximal bracteoles as described, distal membranous and acuminate.

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.

white or red and somewhat glaucous, spheric, 9-16 mm, dry or juicy, hollow.

scales 2-3 mm, deciduous.

scales 1.5-4 mm, deciduous.