Flora of North America species comparison

3–7, along length of stem, alternate, ascending to spreading;

blade elliptic to elliptic-lanceolate or ovate-lanceolate, 5–19 × 1.5–6 cm.

1(–2);

sepals white or green;

dorsal sepal suborbiculate to obovate-orbiculate, rarely elliptic, 11–20 × (7–)9–15 mm;

lateral sepals connate to nearly distinct, 6–12 mm, segments 3–6 mm wide;

synsepal 6–15 mm wide;

petals spreading, white, oblong to linear-elliptic, flat, 12–20 × 3–6 mm;

lip white, rarely pinkish, obovoid, 11–20 mm;

orifice basal but often proportionally very large, 9–13 mm;

staminode cordiform-ovoid to ovoid-oblong. 2n = 20.