Flora of North America species comparison

mesophyllous, 5.5–9.5 cm, glabrous or glabrate;

stipules caducous;

extrafloral nectary 1, between first leaflet pair, sessile or short-stipitate;

leaflet pairs 3, blades oblong-lanceolate, 25–60 × 5–14 mm.

slightly sclerophyllous, 5–10 cm, dull glaucescent, sparsely hairy;

stipules caducous, 1–3 mm wide;

extrafloral nectaries between all leaflet pairs, stipitate;

leaflet pairs 3–6, blades oblong- or ovate-elliptic, 15–40 ×7–13 mm.

4–18-flowered;

bracts caducous.

usually 5–25-flowered;

bracts caducous.

13–23 mm.

0–5 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 (similar to S. lindheimeriana but smaller);

calyx usually pale green, rarely yellow;

corolla yellow, longest petal 8–10.5 mm;

androecium heterantherous, stamens 7, staminodes 3;

anthers 3–5 mm, dehiscing by 1 apical pore, apical appendage 0;

gynoecium linear, ovules unknown;

ovary densely hairy;

style incurved.

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

erect, flat, straight or slightly incurved, 40–120 × 3.5–6.5 mm, shallowly corrugated over seeds, dehiscent.

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

brown, obovoid or oblong-obovoid.

= 28.