Flora of North America species comparison

prostrate, silvery-pilose.

erect or ascending, fistulose, pilose-tomentulose or white-lanate, rarely white-tomentulose.

1–4 cm;

stipules 2–8 mm, hyaline, densely pilose abaxially;

leaflets usually 3, rarely 5, blades narrowly to broadly oblanceolate or obovate-cuneate, 3–13 mm, apex subacute, surfaces silvery-pilose.

3–13(–15) cm;

stipules connate-sheathing at proximal nodes, connate or distinct at distal nodes, 3–12 mm, papery-membranous becoming scarious; mostly sessile;

leaflets (23–)27–41, blades narrowly oblong to oblong, oblong-elliptic, or linear-lanceolate, (2–)5–30 mm, apex obtuse or emarginate and apiculate, surfaces pilose-tomentulose.

(2 or)3–5-flowered;

axis to 1 cm in fruit;

bracts 1–2.5 mm.

many-flowered, flowers declined and retrorsely imbricate in spikelike heads, 20–70(–90) × 18–23 mm;

axis 2.5–8(–9.5) cm in fruit;

bracts (1.2–)1.6–4 mm;

bracteoles 0.

0.5–2.5 cm.

erect or incurved-ascending, 2–10 cm.

1–3.5 mm.

0.7–1.8 mm.

5–6.2(–8) mm;

calyx campanulate, 2.4–4.2 mm, densely pilose, tube 2–3 mm, lobes triangular-subulate, 1–1.2 mm;

corolla pink-purple or white, often drying yellowish;

banner recurved through 90°;

keel 4–4.5 mm, apex bluntly deltate.

7–10 mm;

calyx ovoid-campanulate, 5.4–7.8 mm, villosulous, tube 3.7–5.2 mm, lobes ± subulate, 1.2–3 mm;

corolla greenish white or cream;

keel 7.1–9.1 mm.

ascending or recurved, ovoid-ellipsoid, slightly compressed, 3–4.5 × 2 mm, papery, densely silky-strigose or silky-pilose.

deflexed or declined, green becoming stramineous or brownish, ovoid-lenticular, slightly inflated, somewhat compressed laterally, 6–11 × 3.5–6 mm, thin becoming papery, somewhat lustrous, glabrous or sparsely strigulose;

sessile.

6–10.

(2 or)3–12.