Flora of North America species comparison

3–4, along middle portion of stem, spiraled to alternate, ascending to spreading;

blade narrowly elliptic to ovate-lanceolate or oblong, 5–11 × 1.3–3.5 cm.

usually solitary (rarely 2 in forma biflorum P.

.

);

sepals green with reddish brown markings;

dorsal sepal broadly elliptic to ovate-lanceolate, 15–25 × 5–10 mm;

lateral sepals distinct, 12–20 × 1.5–4 mm;

petals somewhat spreading, same color as sepals, somewhat spirally twisted, linear- to linear-lanceolate, 11–24 × 1–2 mm;

lip white with green apex, usually with extensive reddish reticulations often merging toward apex, adaxially swollen near middle, 10–16 mm, apex abruptly deflected downward, orifice basal, 7–12 mm;

staminode suborbicular.

= 20.