Flora of North America species comparison

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.

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.

usually solitary (rarely 2 in forma biflorum P.

(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.

.

);

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.

= 20.