Flora of North America species comparison

1-several, erect to prostrate-ascending, (1.5-)2-4(-6) dm.

10-50, prostrate-ascending, 2-3.5 dm.

crowded, compound;

blade with 2 orders of leaflets and lobes; ultimate lobes ovate, oblong-elliptic, or obovate, margins incised, apex subapiculate.

compound;

blade with 3 orders of leaflets and lobes; ultimate lobes elliptic, 1.5 times or more longer than wide, margins incised, apex subapiculate.

racemose, (6-)10-16(-20)-flowered, primary racemes slightly to conspicuously exceeding leaves, secondary racemes fewer flowered, exceeded by leaves, cleistogamous-flowered racemes frequently present, 1-5-flowered, inconspicuous;

bracts elliptic to attenuate-ovate, 5-8 × 2-4 mm, margins denticulate, distal bracts usually much reduced, those of cleistogamous racemes minute.

racemose, 10-20(-30)-flowered, primary racemes shorter than to slightly exceeding leaves, secondary racemes fewer flowered;

bracts elliptic to linear, 4-10 × 1-2 mm, rarely larger, margins often denticulate toward apex, distal bracts usually much reduced.

erect or spreading;

pedicel 2-6 mm;

sepals ovate, to 1.5 mm, margins often sinuate or dentate;

petals pale to medium yellow; spurred petal slightly to strongly curved, (11-)12-14(-15) mm, spur straight, 4-7 mm, apex obtuse or ± globose, crest low, wrinkled, rarely obsolescent, marginal wing well developed, sometimes revolute, unspurred outer petal slightly bent, 9-11 mm, crest low;

inner petals oblanceolate, 7-10 mm, blade apex 2 times or more wider than base, basal lobes obscure, claw 3-4 mm; nectariferous spur straight or curved, sometimes clavate, ca. 3/5 length of petal spur;

style ca. 4 mm;

stigma rectangular, 2-lobed, 1/2 as long as wide, with 8 papillae.

at first erect, later reflexed;

pedicel 5-10 mm;

sepals ovate to attenuate-ovate, to 1-3 mm, margins often sinuate or dentate;

petals pale to bright yellow; spurred petal 13-16 mm, spur straight or slightly incurved, 4-5 mm, apex subglobose, crest low and incised or absent, marginal wing moderately to well developed, unspurred outer petal 9-11 mm, crest same as that of spurred petal;

inner petals oblanceolate, 8-10 mm, blade wider than claw and more prominently winged toward apex, claw 3.5-4.5 mm; nectariferous spur 2-3 mm;

style ca. 3 mm;

stigma 2-lobed, 1/2 as long as wide, with 8 papillae.

erect, linear, slender, straight to slightly incurved, 10-35 mm, essentially glabrous, usually shorter in cleistogamous-flowered racemes.

erect to pendent at maturity, linear, often torulose, slender to somewhat stout, straight to moderately incurved, 12-24(-30) mm.

ca. 1.5 mm diam., concentrically and minutely decorated, marginal ring absent.

nearly 2 mm diam., appearing essentially smooth under magnification, narrow marginal ring present or absent.