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.

3–9, along length of stem, alternate, ascending to spreading;

blade broadly elliptic to ovate or elliptic-lanceolate, 10–27 × 5–16 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.

1–3(–4);

sepals white;

dorsal sepal suborbiculate to ovate-orbiculate, 25–45 × 18–42 mm;

lateral sepals connate, synsepal 24–42 × 15–37 mm;

petals spreading, same color as sepals, oblong to elliptic or ovate-lanceolate, flat, 25–47 × 6–17 mm;

lip white, usually suffused around orifice and variably beyond with pale pink to crimson magenta, subglobose-obovoid, 25–53 mm;

orifice basal, 18–28 mm;

staminode cordiform-ovoid to ovoid-lanceoloid.

= 20.