Flora of North America species comparison

yellow, greenish, or purplish brown, base strongly thickened, bulbous.

racemes lax, 11–46 × 1–2.5 cm.

5–26, inconspicuous;

perianth open or closed;

sepals and petals reddish purple to brown, often suffused with green, broadly lanceolate, 1–2-veined;

lateral sepals strongly curved upward and directed forward, 3–4.5 mm;

petals 2.5–3.8 mm, connivent with dorsal sepal to form hood over column, or sepals and petals connivent to produce closed flower;

lip white, often spotted with purple, ovate to orbiculate-quadrangular, unlobed, 2.7–4.6 ×1.8–3.7 mm, thin, with 2 distinct basal lamellae, margins entire to erose-fringed;

column white basally, often purple apically, 1.9–2.5 mm, straight or curved toward lip, with 2 distinct auricles in open-flowered plants;

ovary 2.5–5 mm;

mentum inconspicuous.

broadly ellipsoid, 5.5–8 × 3.5–5 mm.