Flora of North America species comparison

5–10, along length of stem, alternate, ascending to spreading;

blade elliptic-lanceolate to broadly elliptic, 5–16 × 1.5–6.5 cm.

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.

3–18(–22);

sepals yellow-green to pale brownish yellow;

dorsal sepal elliptic, 14–20 × 7–13 mm;

lateral sepals connate almost to apex;

synsepal 12–20 × 10–12 mm;

petals spreading, same color as sepals or more yellowish, linear-oblong to linear-lanceolate, flat, 14–16 × 3–5 mm;

lip white, sometimes pinkish, obovoid, 15–20 mm;

orifice basal, 11–14 mm;

staminode suborbicular-subauriform.

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.