Flora of North America species comparison

5–55-flowered, not spikelike;

bracts early caducous, to 5 mm.

usually 5–25-flowered;

bracts caducous.

13–28 mm.

6–22 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 usually pale green or pinkish, rarely yellow;

corolla yellow, longest petal 10.5–16 mm;

androecium heterantherous, stamens 7, staminodes 3;

anthers 3–5.1 mm, dehiscing by 1 apical pore, apical appendage 0;

gynoecium linear, ovules 20–28;

ovary densely hairy;

style incurved.

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

erect, flat, straight, 30–65 × 5–9 mm, shallowly corrugated over seeds, dehiscent.

reddish brown, obovoid to oblong-obovoid.

brown, obovoid or oblong-obovoid.

= 28.