Flora of North America species comparison

1, at middle or proximal 1/3 of stem, sheathing leaf bases persistent, shredding;

blade ovate-elliptic or oblanceolate, keeled abaxially, 2.4–15 × 1–5.2(–6) cm, apex acute.

1, within proximal 1/3 of stem;

blade orbiculate-ovate or ovate-lanceolate, (3–)4.1–8.5(–10) × 0.2–0.45(–0.65) cm, apex obtuse to acute.

spicate racemes, rachis thick, slightly ridged or fluted, 6–22 cm;

floral bracts triangular to lanceolate, 0.5–1 mm;

pedicels 1.3–1.7 mm.

racemes, 6–25 cm;

rachis slightly angled;

floral bracts triangular to lanceolate, 1–2 × 0.5 mm, apex acute;

pedicels not crowded, 2.5–5 mm.

40–160, not resupinate, green to yellowish green;

dorsal sepal ovate to elliptic, 1.5–2.8 × 0.8–1.3 mm, apex acuminate;

lateral sepals ovate to elliptic, falcate, 1.5–2.8 × 0.8–1.3 mm, apex acuminate;

petals strongly reflexed, filiform to linear, falcate, 1.3–2 × 0.2–0.3 mm, apex acuminate;

lip suborbiculate-ovate to subquadrangular-ovate, 1.5–2.8 × 1.3–2.2(–2.5) mm, base hastate-auriculate, apex obliquely 3-dentate or retuse with apiculum in sinus;

disc deeply concave, 5-veined;

column 0.2–0.5 × 0.2–0.5 mm;

pollinia yellow.

16–133, resupinate, deep maroon or greenish maroon;

sepals papillose, not glabrous;

dorsal sepal lanceolate, 1.8–2.4 × 0.8–1.2 mm, margins revolute, apex acute;

lateral sepals lanceolate-elliptic, falcate, 1.8–2.4 × 0.8–1.2 mm, apex acute;

petals strongly recurved, linear to filiform, slightly falcate, 1.8–2.2 × 0.2–0.4 mm, apex obtuse;

lip linear to linear-lanceolate, 1.8–2.3 × 1.3–1.8 mm, base with auricles broad and diverging, apex narrowly acuminate;

column 0.5–0.8 × 0.5–0.8 mm;

pollinia yellow.

ascending, ellipsoid, 7 × 3 mm.

ascending, ellipsoid, 5 × 3 mm.

5–15 mm diam.

5–10 mm diam.