Flora of North America species comparison

glabrous.

densely to sparsely pubescent with short white hairs along ribs, glabrescent.

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.

1–4 cm;

stipules persistent, 2.5–6 mm, with prominently veined auricles, one developed into a tooth curved under pulvinus, pubescent, hairs white, relatively long;

petiole 3–6 mm;

pinnae 2–4 pairs;

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

leaflets 14–24, blades 3–5.5 mm, venation obscure except eccentric midvein, surfaces glaucous, glabrous.

1–2.3 cm, 1–3.5 cm in fruit.

0.6–2 cm, 1–2 cm in fruit.

stamens 10;

staminodia 7.5–17 mm, showy;

style exserted 3–5 mm beyond stamens.

stamens 10;

staminodia 6–8 mm;

style slightly 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.

brown to nearly black, ± falcate, linear-oblong, not constricted between seeds, dehiscent along both sutures, 2.7–5 cm × 2.5–4.5 mm, apex apiculate with beak 1–4 mm.

1 or 2 per axil, 23–43-flowered;

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

1 per axil, 6–12-flowered;

sterile flowers 0–3 per head; staminate and bisexual flowers 5–10 per head.

= 28.