Flora of North America species comparison

5–55-flowered, not spikelike;

bracts early caducous, to 5 mm.

usually 3–15-flowered;

bracts caducous.

13–28 mm.

12–26 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 deep yellow, longest petal 12–19 mm;

androecium heterantherous, stamens 7, middle stamens 1/2 as long as abaxial or smaller, staminodes 3;

anthers of middle stamens 3.7–5 mm, of abaxial stamens 6–7.5 mm, dehiscing by 2 pores, apical appendage inconspicuous;

gynoecium incurved, ovules 30–50;

ovary densely hairy;

style slightly incurved.

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

somewhat pendulous, cylindrical, 70–135 × 7–10 mm, slightly corrugated over seeds, indehiscent.

reddish brown, obovoid to oblong-obovoid.

brown or dark reddish brown, obovoid.

= 24.