Flora of North America species comparison

decumbent and ascending, sometimes fistulose, sparsely strigulose or glabrous.

several to many.

(5–)8–20 cm;

stipules mostly distinct, (2–)4–10 mm, papery at proximal nodes, herbaceous at distal nodes;

sessile or subsessile to short-petiolate;

leaflets 25–41, blades narrowly oblong, ovate-cuneate, or rhombic-ovate, (3–)6–30(–37) mm, apex truncate, emarginate and apiculate, or subacute, surfaces sparsely strigulose or glabrous abaxially, glabrous adaxially.

odd-pinnate, subsessile to petiolate;

leaflets (11–)17–43.

(10–)20–45-flowered, flowers horizontal or declined;

axis 3.5–9 cm in fruit;

bracts 1.5–3.5 mm;

bracteoles 0.

usually densely flowered, flowers horizontal, declined, or nodding, sometimes retrorsely imbricate.

erect or incurved-ascending, 5.5–14 cm.

0.6–3.5 mm.

11.1–15.3 mm;

calyx broadly campanulate, obliquely truncate or subgibbous abaxially, 5–7.2(–7.7) mm, strigulose, tube 3.5–4.8(–5) mm, lobes subulate or triangular-subulate, (1–)1.3–2.6(–3) mm;

corolla white, greenish white, or ochroleucous;

keel 9.4–13.2 mm.

greenish white, cream, or ochroleucous, keel apex sometimes faintly lilac-tipped, banner recurved through 35–50°, keel apex obtuse.

tubes campanulate or cylindric, sometimes gibbous proximally.

readily deciduous, horizontal or ascending, pale green or purplish stramineous, obliquely ovoid or semi-ovoid, bladdery-inflated, (18–)23–45(–50) × (10–)12–20 mm, thin becoming papery, translucent, sublustrous, sparsely strigulose or glabrate;

sessile.

eventually deciduous, sessile, gynophore sometimes present, loosely ascending, spreading, or declined, obliquely ovoid, semi-ovoid, ovoid-lenticular, obovoid, rhombic-ellipsoid, or ovoid-ellipsoid, straight or slightly curved, usually bladdery inflated, sometimes barely inflated, or laterally or dorsiventrally compressed, unilocular.

34–55.

(2 or)3–12 or 12–55.

basifixed.

connate or distinct at distal nodes (except A. pomonensis ± distinct throughout).

= 22.