Flora of North America species comparison

erect or decumbent to ascending, ± strongly flexuose aboveground, (0–)2–6 cm underground, strigulose.

decumbent to ascending, 1.5–10(–18) cm underground, strigulose or pilosulous.

30–100 cm;

stipules (1–)2–5 mm, membranous at proximal nodes, herbaceous at distal nodes;

leaflets (5–)9–15, blades elliptic-oblong, oblanceolate, or linear, 3–25 mm, apex usually obtuse or retuse, rarely subacute, surfaces strigulose.

1.5–8(–11) cm;

stipules connate at proximal nodes, sometimes connate to 1/2 their length at distal nodes, 1.5–5 mm, papery at proximal nodes to thinly herbaceous at distal nodes;

leaflets (7–)11–19(–23), blades broadly obovate, obovate-cuneate, broadly oblong-elliptic, or suborbiculate, (1.5–)3–12(–17) mm, apex retuse, surfaces sparsely strigulose or pilosulous abaxially, glabrous, glabrate, or strigulose adaxially.

(5–)8–20(–26)-flowered, flowers ascending becoming declined;

axis (1.5–)3–12(–17) cm in fruit, elongating;

bracts 2–3.5(–5) mm;

bracteoles 0–2.

(4–)8–22(–33)-flowered;

axis (1–)2–6(–7.5) cm in fruit;

bracts 1–2.2 mm;

bracteoles 0.

erect or divaricate, 3–9(–12) cm.

incurved-ascending, (1–)1.5–8.5 cm, equal to or shorter than subtending leaf.

1–2.3 mm.

1–2 mm.

(12–)13.5–18 mm;

calyx pallid or purplish, cylindric or deeply campanulate, (5.8–)7.5–9 mm, strigulose, tube (4.6–)5.8–7.5 mm, lobes subulate or triangular-subulate, 1.2–1.8 mm;

corolla usually pink-purple and wing tips white, rarely white throughout;

keel 10.6–13.3 mm.

6.5–7.8 mm;

calyx campanulate or turbinate-campanulate, 3.2–4.5 mm, strigulose, hairs black, white, or fuscous, tube 2.2–2.7 mm, lobes subulate, 1–1.8 mm;

corolla whitish tinged with dull lilac;

banner recurved through 85°;

keel 4.4–6 mm.

promptly deciduous, deflexed, red- or brownish-mottled becoming stramineous or brownish, usually ± sigmoid-arcuate, rarely straight, lanceoloid-ellipsoid or oblong-ellipsoid, obcompressed, 20–55 × (5–)6–10 mm, fleshy becoming stiffly leathery, strigulose.

stramineous, straight or slightly arched downward, oblong or clavate-ellipsoid, obcompressed, (7–)9–15 × 3–6 mm, ± bilocular, papery, strigulose or villosulous;

valves inflexed as partial or nearly complete septum 0.8–1.3 mm wide;

stipe obscure.

32–42.

10–13.