Flora of North America species comparison

glabrous or pilose, hairs persistent, close-pressed, golden or clear in age, developing leaves and young stems with same pubescence of simple hairs;

pith solid or spongy.

with close-pressed hairs;

pith not observed.

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.

8–43+ cm;

stipules 0.8–0.9 cm, with conspicuous inner fold throughout, inner fold often with velutinous, stipitate glands, glands absent at base;

pulvinus at least 1/2 as long as petiole;

rachis glabrescent or glabrous, with stipitate glands at base of leaflets in canal (not between leaflet pairs);

stipels long, narrow, glandular;

leaflets 10–20–50+, blades ligulate to elliptic-oblong, base obtuse to acute, apex emarginate to truncate, surfaces usually glabrous, sometimes with close-pressed, golden hairs.

5–15+-flowered, racemes.

1–12+-flowered, racemes or panicles.

(0.6–)1.7–2.1(–4.1) cm.

(1.2–)1.9–2.3(–3.1) cm.

(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.

(5.1–)6.3–7(–7.9) cm;

calyx zygomorphic, ± bilabiate, lobes 0 or 5, rounded or obsolete, rim often with sinuous hairs from inner surface, with short, straight, close-pressed hairs on outer surface near teeth, stalked glands absent from rim, absent in fruit;

corolla white or red-crimson;

banner oblong, base truncate to cordate, apex emarginate, calluses as shallow ridges along claw;

wings without basal tooth;

keel ± same color throughout or claw white and blade pink or scarlet, apex acute-rounded, curved upward to slightly inward, with basal tooth;

stamens curved upward within keel;

style curved upward with keel;

ovules 27–48.

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.

brown-tan, without mottling, flattened parallel to sutures, rectangular in cross section, straight to falcate, (35.1–)38.7–43.8(–49.7) × (0.5–)0.7–0.8(–0.9) cm, beak gradually tapered, flattened, (0.6–)1–1.7(–2) cm, tardily dehiscent;

stipe (4.3–)4.4–4.5(–4.6) cm.

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

(27–)35–40(–46), yellow-green or brown to reddish, without mottling, reniform-orbicular.

= 12.

= 12.