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.

2(–3,very rarely), on middle half of stem, alternate to subopposite, wide-spreading;

blade lance-ovate to ovate-suborbiculate, 5–15 × 1.5–8 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.

solitary, erect;

sepals white with pink to reddish or magenta markings;

dorsal sepal ovate- to suborbiculate-elliptic, 12–28 × 6–19 mm;

lateral sepals connate, synsepal 12–21 × 3–8 mm;

petals spreading, same color as sepals, lanceolate-subpandurate (constricted near apex), flat, 10–20 × 4–9 mm, slightly shorter than to equaling lip, margins undulate-revolute to slightly spiraled;

lip similarly colored, subglobose to obovoid, 15–30 mm;

orifice basal, 10–24 mm;

staminode oblong-quadrangular to broadly ellipsoid or ovoid.

= 20, 20.