Flora of North America species comparison

glabrous or sparsely pubescent with short white hairs along ribs, glabrescent.

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

1–3[–6.5] cm;

stipules persistent, 2.1–9 mm, with membranous, prominently veined auricle opposite petiole, glabrous or pubescent;

petiole 1–5 mm;

pinnae 2–5 pairs;

nectary present, sessile, crateriform, interpinnal between proximal pair of pinnae;

leaflets 22–46, blades 2.7–7 mm, venation obscure except for eccentric midvein, 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.

0.6–4 cm, 1–5.2 cm in fruit.

0.6–2 cm, 1–2 cm in fruit.

stamens 10;

staminodia 1.5–7.5 mm;

style not exserted beyond stamens.

stamens 10;

staminodia 6–8 mm;

style slightly exserted beyond stamens.

reddish brown to nearly black, straight or weakly falcate, linear, not constricted between seeds, dehiscent along both sutures, 2.2–6[–8.8] cm × 2.5–4 mm, apex acute to attenuate.

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 per axil, 3–22-flowered, sometimes only bisexual flowers present;

sterile flowers 0–8 per head;

staminate and bisexual flowers 3–14 per head.

1 per axil, 6–12-flowered;

sterile flowers 0–3 per head;

staminate and bisexual flowers 5–10 per head.

= 28.

= 28.