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.

2, initially near middle of stem, subopposite, wide-spreading, distal portion elongating greatly in fruit;

blade elliptic to ovate-orbiculate, 4–12 × 2.5–7.5 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.

(1–)2–4;

sepals dull yellow, marked and suffused often intensely with reddish brown or dark purple;

dorsal sepal lanceolate, 13–25 × 3–8 mm;

lateral sepals connate, synsepal 11–23 × 4–9 mm;

petals porrect-spreading, same color as sepals, flat, ovate-lanceolate to lance-acuminate, 10–23 × 6–17 mm;

lip color of sepals, usually less intensely marked, mostly obovoid, 8–14(–25) mm, orifice basal, 4–5 mm;

staminode ellipsoid to oblong.

= 20.