Flora of North America species comparison

± strongly thickened, base not bulbous.

racemes dense, 35–65 × 1.5–4 cm.

8–35, showy;

perianth open;

sepals reddish purple, sometimes yellowish near base, or completely yellow, lanceolate, 3-veined, 6–12 mm;

dorsal sepal arching over column, nearly adhering to it;

lateral sepals strongly spreading;

petals arching over column, connivent with dorsal sepal, often yellowish basally, and streaked with purple, or completely yellow suffused with purple toward apex;

lip red-purple, white, or white with purple streaks or spots, narrowly obovate, 4.8–9.5 × 2.5–5 mm, thin, usually with small (0.7 mm) tooth on each side, margins undulate-denticulate;

column curved somewhat toward lip, yellow, often flushed with purple or white basally, and streaked or spotted with purple, 5–8.2 mm;

ovary 5.9–10 mm;

mentum prominent, protruding backward along ovary but free from it.

ellipsoid, 10–25 × 6–9 mm.

= 40.