Flora of North America species comparison

8–30+ cm;

stipules 0.9–1.1 cm, with inconspicuous inner fold 2/3 its length, inner fold and base often with stipitate, multicellular glands or glabrous;

pulvinus as long as petiole;

rachis ± glabrous, without stipitate glands, obscure gland sometimes present at petiolule base;

stipels absent;

leaflets 16–50+, blades elliptic-ovate to oblong, base acute, apex rounded-obtuse, surfaces usually glabrous.

13–25+ cm;

stipules 0.3–0.4 cm, with conspicuous inner fold throughout, hairs dense, close-pressed, inner fold and base with stipitate, multicellular glands;

pulvinus slightly more than 1/2 as long as petiole;

rachis ± sericeous, without stipitate glands, obscure gland(s) present at petiolule base;

stipels reduced in size between successive leaflets, long-filamentous glandular;

leaflets 28–36+, blades elliptic-ovate to oblong, base acute, apex obtuse to acute, surfaces silky sericeous abaxially, usually glabrous adaxially.

1–6+-flowered, racemes.

5–15+-flowered, racemes.

(3.7–)6.4–7.4(–12.2) cm.

(0.6–)1.7–2.1(–4.1) cm.

(8–)8.4–9(–9.7) cm;

calyx ± zygomorphic, ± persistent in fruit, lobes 5, short-acuminate, rim of tube glabrous, stalked glands sometimes present between lobes;

corolla yellow-orange, banner base with bright yellow spot, wings and keel usually darker;

banner ovate, base truncate, apex emarginate, calluses absent or as relatively small teeth at claw base, thickened, knoblike at base of blade/top of claw;

wings with basal tooth;

keel apex ± darker, acute, curved upward to slightly inward, without basal tooth;

stamens incurved within keel;

style recurved;

ovules 1–3.

(0.7–)0.9–1(–1.3) cm;

calyx ± zygomorphic, lobes 5, short-acuminate, rim of tube villose, stalked glands between abaxial lobes absent in fruit;

corolla yellow, banner venation sometimes darker;

banner ovate, base cordate-truncate, apex emarginate, becoming strongly reflexed and contorted, calluses as relatively small, acute teeth at claw base, thickened, knoblike at base of blade/top of claw;

wings without basal tooth;

keel ± same color throughout, apex acute, curved strongly inward, without basal tooth;

stamens incurved within keel;

style recurved;

ovules 4–6.

tan-brown, often with horizontal mottling in age, flattened-inflated, flat to elliptic in cross section, straight, (4.5–)6.1–6.7(–8.2) × (1.1–)1.2–1.3(–1.6) cm, beak gradually tapered, flattened, (0.4–)0.5–0.6(–0.7) cm, tardily dehiscent;

stipe (0.8–)1.1–1.2(–1.5) cm.

red- to gray-brown, without horizontal mottling in age, 4-angled, square in cross section, straight or slightly falcate, (0.8–)4.4–5.5(–6.5) × (0.7–)0.8(–0.9) cm, thick, woody, seed chambers apparent in young fruits becoming obscure at maturity, margins of young fruits with shallow thin ridges resembling early wings of S. punicea or S. drummondii, ridges becoming thickened and rounded at maturity, beak short-pyramidal, (0.2–)0.4–0.7(–1.3) cm, indehiscent;

stipe (0.4–)0.5–0.6(–0.9) cm.

1 or 2(or 3), gray-brown to reddish, without mottling, reniform, not easily released, enveloped in indehiscent, papery endocarp.

(1–)4 or 5(or 6), reddish brown to gray, without mottling, reniform-orbicular.

= 12.

= 12.