Flora of North America species comparison

mesophyllous, 11–26 cm, glabrous or glabrate;

stipules caducous;

extrafloral nectary 1, base of petiole, sessile or subsessile;

leaflet pairs 4 or 5(or 6), blades lanceolate- or ovate-acuminate, 45–100 × 12–38 mm.

4–18-flowered;

bracts caducous.

usually (1 or)2–5-flowered;

bracts caducous, longer than bud, often blackish green.

13–23 mm.

8–21 mm.

monosymmetric;

calyx brownish to greenish yellow;

corolla golden yellow, longest petal 8–16 mm;

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

anthers of middle stamens to 3.6–4.8 mm, of abaxial stamens 5.2–6.5 mm, dehiscing by nearly U-shaped pore, apical appendage inconspicuous;

gynoecium incurved, ovules 34–50;

ovary hairy;

style slightly incurved.

monosymmetric;

calyx pinkish or fuscous;

corolla yellow, longest petal 12–17 mm;

androecium heterantherous, stamens 6, staminodes 3 + 1;

anthers of middle stamens 3.2–5.2 mm, of abaxial stamens 4.9–6.6 mm, elongated beyond pores, dehiscing by U-shaped pore, apical appendage linguiform, thickened;

gynoecium incurved, ovules 40–60;

ovary densely hairy;

style slightly incurved.

somewhat pendulous, cylindrical, straight, 40–120 × 6–10 mm, corrugated over seeds, indehiscent.

ascending, flat, slightly curved or straight, linear, 80–135 × 6.5–9.5 mm, corrugated over seeds, dehiscent.

dull brown or dark reddish brown, obliquely obovoid or oblong-ellipsoid.

olive green or brownish, obovoid.

= 28.

= 26, 28.