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.

sometimes with prickles, sericeous, hairs persistent, golden tan;

pith spongy.

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.

10.5–22.3 cm;

stipules 0.6 cm, golden tan-sericeous, with conspicuous inner fold 3/4 its length, base of fold unlike other Sesbania with additional shorter fold that parallels long one, inner fold without stipitate, multicellular glands, glands often present at base;

pulvinus more than 1/2 as long as petiole;

rachis sericeous, with stipitate glands in canal;

stipels long, narrow, ± glandular;

leaflets 34–96+, blades elliptic-ovate to broadly linear, base obtuse to acute, apex truncate to rounded obtuse, surfaces sericeous, hairs dense, golden tan abaxially, usually glabrous adaxially.

5–15+-flowered, racemes.

1–18+-flowered, racemes.

(0.6–)1.7–2.1(–4.1) cm.

(0.2–)0.5–0.6(–1.5) 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.

(0.7–)0.8–0.9(–1.9) cm;

calyx actinomorphic, lobes 5, deltate-acuminate, rim of tube with net of long hairs, stalked glands present at base of sinus, absent in fruit;

corolla yellow-orange, banner sometimes with purple-maroon spots on outer surface;

banner ovate, base broadly tapered, apex emarginate, calluses as ridges along claw, callus apices truncate;

wings without basal tooth;

keel same color throughout, similar to wings, apex ± truncate, curved upward to inward towards calyx, with basal tooth;

stamens curved inward within keel;

style recurved towards banner;

ovules 18–32.

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.

reddish brown, with horizontal mottling, narrow-elongate, terete to elliptic in cross section, straight to falcate, (1.7–)10–12.7(–18.8) × (0.2–)0.3(–0.4) cm, beak connate, narrowly tapered, 0.2(–0.4) cm, tardily elastic dehiscent;

stipe (0.1–)0.2(–0.3) cm.

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

(3–)19–24(–32), greenish gray to brownish red, without mottling, columnar.

= 12.

= 12, 24.