Flora of North America species comparison

mesophyllous, 10–27 cm, glabrous or glabrate;

stipules caducous;

extrafloral nectaries 1(or 2), base of petiole or, in some leaves, along petiole, sometimes also between first, and rarely subsequent, pair of leaflets, subsessile or shortly stipitate, globose-flattened;

leaflet pairs 4–8, blades obliquely lanceolate, 30–70 × 6–22 mm.

1–5-flowered;

bracts caducous.

usually 5–40-flowered;

bracts caducous, green, equal to or shorter than bud.

9–16 mm.

10–26 mm.

monosymmetric;

calyx caducous, pale green;

corolla yellow or orange-yellow, longest petal 12–17 mm;

androecium not heterantherous, stamens 7, staminodes 3;

anthers 2.2–3.3 mm, dehiscing by 1 apical pore, apical appendage 0;

gynoecium nearly linear, ovules 22–40;

ovary densely hairy;

style slightly incurved.

monosymmetric;

calyx greenish or yellowish;

corolla yellow, longest petal 12–25 mm;

androecium heterantherous, stamens 7, staminodes 3;

anthers of middle stamens to 3.6–5 mm, of abaxial stamens 4–5.8 mm, elongated beyond pores, dehiscing by U-shaped pore, apical appendage short, linguiform, thickened;

gynoecium incurved, ovules 36–56;

ovary finely hairy;

style slightly incurved.

erect, subcylindrical, straight or slightly curved, 20–35 × 4.5–6.5 mm, corrugated over seeds, dehiscing apically downward.

ascending, subcylindrical, slightly curved, 70–140 × 5–8.5 mm, corrugated over seeds, indehiscent.

brown or pinkish brown, paddle-shaped or pyriform.

olive green or smoke-gray, obovoid to oblong-ellipsoid.

= 28.