Flora of North America species comparison

4–6, inserted toward base or scattered along stem, alternate, erect, ascending, or spreading;

blade suborbiculate or broadly ovate to elliptic-lanceolate, 3.3–17 × 2.5–9.5 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.

1–3;

sepals greenish, suffused, often heavily, with reddish brown or madder, or rarely clear green;

dorsal sepal lance-acuminate to elliptic-lance-acuminate, 33–60 × 8–16 mm;

lateral sepals connate;

synsepal 30–60 × 6–18 mm;

petals spreading-deflexed, same color as sepals, spirally twisted, linear to linear-lanceolate, 36–77 × 3–5 mm;

lip white, rarely suffused with magenta, obovoid or oblance-ovoid to oblance-fusiform, 19–33 mm;

orifice basal, 13–22 mm;

staminode lanceoloid to broadly ovoid or ellipsoid-ovoid.

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.