Flora of North America species comparison

erect or ascending, sparsely strigulose.

obscured by stipules and marcescent leaf bases.

(3–)4–12 cm;

stipules connate and scarious-papery at proximal nodes, distinct and herbaceous at distal nodes, 1.5–5 mm;

leaflets (17–)21–29, blades flat or loosely folded, oblong-oblanceolate or elliptic, 3–13 mm, apex obtuse to subacute, surfaces sparsely strigulose abaxially, glabrate or glabrous adaxially.

palmately trifoliolate, 1–13 cm;

stipules sometimes ruptured in age, 6–18 mm, hyaline;

leaflet blades spatulate to elliptic, (3–)7–27(–37) mm, apex acute to obtuse, surfaces silvery-strigose.

(5–)10–30-flowered;

axis (1.5–)3–19 cm in fruit;

bracts 1–2 mm;

bracteoles 2.

1–3-flowered, capitate;

axis very short in fruit;

bracts tridentate, 4.5–7.6 mm;

bracteoles 0(or 1).

(2–)4–11 cm.

obsolete.

0.6–1.5 mm.

0–1.6 mm.

5.8–8 mm;

calyx marcescent, 3.4–4.3 mm, strigulose, hairs black and/or white, tube 2.1–2.7 mm, lobes subulate, 1–2 mm;

corolla whitish or, sometimes, greenish ochroleucous, immaculate;

banner abruptly incurved through 90°;

keel 4.2–5.6 mm.

16–29 mm;

calyx 9.3–18(–20) mm, loosely villous, tube (6.5–)10–14(–16) mm, lobes linear or narrowly subulate, 1.6–4 mm;

corolla usually whitish to ochroleucous, rarely purple, petals usually glabrous, banner rarely puberulent adaxially;

banner not differentiated into blade and claw;

keel 10.4–21.8 mm.

stramineous, straight or slightly incurved or decurved, linear-oblong or linear-oblanceolate, 3-sided compressed, 15–30 × (2.5–)3–4 mm, bilocular, papery, glabrous;

valves inflexed as complete septum 1.4–1.9 mm wide;

stipe 1.5–2.5 mm.

straight, ovoid-ellipsoid, 6–10 × 2.5–5 mm, fleshy becoming leathery, densely strigose-hirsutulous.

12–16.

10–17.