Flora of North America species comparison

usually straight, spreading, young growth white-puberulous to tomentose, resting buds absent.

20–32 cm;

stipules 2 mm;

petiole 3–7.5 cm, glabrescent or puberulent;

gland proximal or sub-basal, elliptic, length to 1.5 times width;

pinnae (4 or)5–12 pairs, 5.5–10 cm, with gland between 1 or 2 distal pairs;

leaflets (13–)17–22(–36) pairs, blades not bicolored, oblong, 0.7–1.5 cm, venation palmate, midvein marginal or submarginal, base strongly asymmetric, truncate, apex acute, short-mucronate, surfaces glabrous or sparsely pubescent;

terminal pair not heteromorphic.

alternate, even-bipinnate, not sensitive to touch;

stipules present, early caducous, not spinescent;

petiole, rachis, and pinnae often with extrafloral nectaries; petiolate;

pinnae (1 or)2–12 pairs, opposite;

leaflets 10–44(–72), opposite, usually asymmetric, terminal pair usually heteromorphic, blade margins entire, surfaces pubescent.

18–25-flowered, terminal or axillary, capitula;

axis densely strigillose.

15–40-flowered, axillary or terminal, capitula or capitulalike corymbs, arranged in panicles;

bracts present, deltate, densely strigillose.

3–9 cm, densely strigulose;

bracts linear-lanceolate, 2(–5) mm.

to 1 mm.

calyx campanulate, (2.5–)6 mm, lobes 5 or 6, glabrescent;

corolla campanulate, (8–)12 mm, lobes 4 or 5, strigillose distally;

stamens 32, white proximally, pink distally, 30–35 mm, tube (10–)12 mm;

terminal or central flower calyx 3 mm, lobes 5, glabrous;

corolla 9–12 mm, lobes 5;

stamens 28 mm, tube long-exerted, to 18 mm.

mimosoid, when dimorphic, central flowers sessile, larger than peripheral, 5 or 7 or 8-merous;

peripheral flowers usually pedicellate, 5-merous;

calyx campanulate or tubular, lobes 5 or 6, calyx and corolla connate, valvate;

corolla whitish or pink to yellow-green;

stamens 20–70, filaments sometimes connate, usually long-exserted;

anthers dorsifixed, eglandular.

legumes, stipitate or sessile, usually straight, flat, oblong, margins slightly thickened, sometimes winged, dehiscent or late dehiscent, glabrous or pubescent;

not fleshy or pulpy, not septate between seeds.

fuscous-ferruginous, 10–20 × 1.5–2.6 cm, margins straight or slightly constricted, base acute, apex rounded, narrowing to a beak to 1.5 cm, valves membranous, glabrescent, smooth or slightly rough.

6–8(–10), 9 × 5 mm.

4–12[–20], globose, obovoid, or wide elliptic; strongly biconvex, with open pleurogram, aril and endosperm absent.

= 13.

= 26, 52.