Flora of North America species comparison

5–55-flowered, not spikelike;

bracts early caducous, to 5 mm.

25–37-flowered;

bracts caducous.

13–28 mm.

11–22 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 pinkish brown;

corolla yellow, longest petal 8–12 mm;

androecium heterantherous, stamens 7, staminodes 3;

anthers of middle stamens 2.6–3.5 mm, of abaxial stamens 4–5 mm, truncate, dehiscing by 2 pores, apical appendage 0;

gynoecium incurved, ovules 10–16;

ovary densely hairy;

style incurved, not dilated.

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

ascending, flat, curved downward, 60–115 × 5.5–8 mm, corrugated over seeds, tardily dehiscent, each seed compartment nearly as wide as long.

reddish brown, obovoid to oblong-obovoid.

ochre, yellowish brown, or dark reddish brown, ovoid or rhomboid.