Flora of North America species comparison

glabrous.

sparsely pubescent on ridges or glabrous.

2–5 cm;

stipules persistent, 1.5–2.5 mm, with flared, membranous bases, glabrous;

petiole 5–15 mm;

pinnae 1–3(or 4) pairs;

nectary sessile or stipitate, crateriform, interpinnal between proximal pair of pinnae;

leaflets 16–34, blades 4–8 mm, venation obscure except for eccentric midvein, sometimes also 1 short, arcuate vein from base, surfaces glabrous.

3.5–12 cm;

stipules persistent, 3.6–12 mm, with small, winged margin at base opposite petiole, glabrous or sparsely pubescent;

petiole 2–10 mm;

pinnae 5–18 pairs;

nectary present or absent, sessile, crateriform, between proximal pair of pinnae;

leaflets 30–70, blades 1.7–6 mm, venation obscure except for nearly centric midvein, surfaces glabrous.

1–2.3 cm, 1–3.5 cm in fruit.

1–6 cm, 1.8–6.5 cm in fruit.

stamens 10;

staminodia 7.5–17 mm, showy;

style exserted 3–5 mm beyond stamens.

stamens 5;

staminodia 4–6 mm;

style not exserted beyond stamens.

brown, straight to slightly arcuate, linear, constricted between seeds, dehiscent along both sutures, 5.5–13 cm × 2.7–4 mm, apex acute, rarely with short beak to 3 mm.

in tight, globose clusters, dark brown, slightly to strongly incurved-falcate, oblong, not constricted between seeds, tardily dehiscent along abaxial suture, dehiscent initially only along adaxial one, 1.5–3.2 cm × 4.5–7 mm, apex acute or attenuate with beak 1–2 mm.

1 or 2 per axil, 23–43-flowered;

sterile flowers 5–16 per head; staminate and bisexual flowers 8–30 per head.

1(or 2) per axil, 22–71-flowered, usually all bisexual, occasionally with a few functionally staminate and sterile flowers at base;

sterile flowers 0–2 per head;

bisexual flowers 22–69 per head.

inserted transversely.

= 28.