Flora of North America species comparison

sclerophyllous, modified as phyllodes, 2–9 cm, thinly pubescent or glabrate;

stipules caducous;

extrafloral nectaries (0 or)1 or 2, highly reduced, on rachis, ± sessile;

leaflet pairs (0 or)2–8(–10), often irregularly inserted or absent, blades ovate, apex obtuse or subacute, 2–9 × 1–6 mm.

5–55-flowered, not spikelike;

bracts early caducous, to 5 mm.

1 or 2-flowered;

bracts caducous.

13–28 mm.

8–21 mm.

asymmetric, enantiostylous;

calyx greenish to yellow;

corolla yellow-orange, slightly dark-veined, longest petal 12–23 mm, highly asymmetric, 1 or both lower petals highly modified, strongly concave and folded over stamens (flag-shaped);

androecium slightly heterantherous, stamens 7 (similar in shape and size, abaxial ones slightly longer), staminodes 3;

anthers 2.8–5 mm, dehiscing by 2 short slits, apical appendage 0;

gynoecium incurved, ovules 46–70;

ovary glabrate, sometimes becoming hairy after fertilization;

style stout.

monosymmetric;

calyx yellow;

corolla yellow, longest petal 7.5–13 mm;

androecium not heterantherous, stamens 7, staminodes 3;

anthers 3–4.3 mm, dehiscing by 1 apical pore, apical appendage 0;

gynoecium linear, ovules 6–12;

ovary hairy;

style incurved.

pendulous, flat, straight, 220–370 × 80–140 mm, woody, indehiscent or splitting transversely into woody segments.

erect, flat or turgid, straight, linear, 20–45 × 5–6.5 mm, not or faintly corrugated over seeds, tardily dehiscent.

reddish brown, obovoid to oblong-obovoid.

dark brown, ovoid.