Flora of North America species comparison

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

± strongly thickened, base not bulbous.

racemes lax, 11–46 × 1–2.5 cm.

racemes lax to dense, 10–67 × 1.2–4.5 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.

2–35, chasmogamous, conspicuous to showy;

perianth open and spreading to connivent;

sepals and petals salmon reddish purple with darker veins or pure yellow, lanceolate to oblanceolate, 3–5-veined;

lip obovate, unlobed, 3.2–16.5 × 2–6.2 mm, thickened, margins deep red with white or yellow at base, or pure yellow, upturned, giving boat-shaped appearance especially toward apex;

callus formed by partial connation of 2 basal lamellae, less than 1/3 length of lip;

column pure yellow or yellow spotted with red, curved toward lip, 3–6 mm, base without auricles or ridges;

ovary 3–8.5 mm;

mentum absent.

broadly ellipsoid, 5.5–8 × 3.5–5 mm.

ellipsoid, 11–30 × 5–10 mm.