Flora of North America species comparison

densely hirsutulous, hairs ascending or spreading, stiff, ± straight, 0.5–0.7 mm.

low, diffuse, 4–15(–20) cm.

usually several to many, rarely single or few clustered (A. ceramicus).

(1.5–)2–4 cm;

leaflets 9–17, blades 3–13 mm.

odd-pinnate, subsessile to short-petiolate or petiolate;

leaflets (0 or 1–)5–23, distally reduced to phyllodia;

terminal leaflet often decurrent.

5–9-flowered;

axis 0.5–2 cm in fruit.

loosely flowered, flowers ascending, spreading, or declined, eventually all declined.

calyx 5.8–9 mm, tube 4.4–5.6 mm, lobes 1.2–1.8 mm, hirsutulous, hairs white or mixed black and white;

corolla ochroleucous;

banner (8.3–)10–14.2(–16.5) mm.

white, pinkish white to pinkish red, yellowish, ochroleucous, or purplish, banner recurved through 35–90°, keel apex triangular or deltate, obtuse, or subacute, sometimes beaklike.

tubes subcylindric or campanulate.

obovoid, tapering to base, 15–35(–42) × 10–20(–25) mm, glabrous;

stipe 3–5(–7) mm.

eventually deciduous, usually stipitate, rarely sessile (A. ceramicus), pendulous, narrowly oblong and strongly compressed, or bladdery-inflated and obovoid-ellipsoid, unilocular.

13–25.

10–30(–37).

usually basifixed, sometimes malpighian (A. ceramicus).

connate or distinct at distal nodes.