Flora of North America species comparison

1–5-flowered;

bracts caducous.

usually 5–25-flowered;

bracts caducous.

9–16 mm.

0–5 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 (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.

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

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

brown or pinkish brown, paddle-shaped or pyriform.

brown, obovoid or oblong-obovoid.

= 28.