Flora of North America species comparison

5–55-flowered, not spikelike;

bracts early caducous, to 5 mm.

(2–)4–8-flowered;

bracts caducous.

13–28 mm.

8–17 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 pale green, pinkish, or yellowish;

corolla golden yellow, longest petal 9–15 mm;

androecium not heterantherous, stamens 7, staminodes 3;

anthers 2.5–4.2 mm, dehiscing by 1 apical pore, apical appendage 0;

gynoecium linear, slightly incurved, ovules 28–42;

ovary hairy;

style filiform, incurved.

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

erect, cylindrical, slightly curved, 180–350 × 50–80 mm, shallowly corrugated over seeds, dehiscing apically downward.

reddish brown, obovoid to oblong-obovoid.

brown, rhomboid.