Flora of North America species comparison

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

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

3-foliolate;

petioles 0.8-5.4 cm.

3-5(-7)-foliolate;

petioles 0.2-0.7 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 but rigid;

surfaces abaxially dull, papillose, adaxially dull, glaucous;

terminal leaflet stalked in most or all leaves, blade 2.1-4.1 × 0.7-1.1 cm, 3-6 times as long as wide;

lateral leaflet blades lance-ovate or lance-elliptic to lanceolate, 1-veined from base, base obtuse or rounded, margins plane or undulate, toothed, each with 4-11 teeth 0-1 mm high tipped with spines to 0.4-2 × 0.1-0.2 mm, apex acuminate.

absent.

absent.

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

bracteoles membranous, apex acuminate.

racemose, lax, 3-8-flowered, 2-5 cm;

bracteoles membranous, apex acuminate, sometimes with proximal bracteoles leathery, spinose-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.

yellowish red to red, not glaucous, spheric, 5-6 mm, juicy, solid.

scales 2-3 mm, deciduous.

scales 2-3 mm, deciduous.