Flora of North America species comparison

2–several, spreading to ascending, scattered along stem, rather abruptly to gradually reduced distally;

blade linear-lanceolate, ovate-lanceolate, elliptic-lanceolate, 5–35 × 1–5 cm.

2, in subequal basal pair, spreading-ascending or lying on ground;

bracts 0(–1, very rarely);

blade orbiculate, broadly elliptic, or obovate, 5–17 × 4–13 cm.

dense to rather lax.

lax.

resupinate, showy, white;

lateral sepals reflexed;

petals linear to oblanceolate, apex fringed to nearly entire;

lip reflexed to porrect, without basal thickening, ovate-oblong to oblong-elliptic, rarely quadrangular-suborbiculate, margin fringed;

spur essentially cylindric, slender;

rostellum lobes curving forward, slightly spreading, angular-elongate;

pollinaria with stalks curved forward;

pollinia remaining enclosed in anther sacs;

viscidia elliptic-suborbiculate to orbiculate;

ovary slender, 10–28 mm.

resupinate, not showy;

calyx green;

corolla commonly yellowish green;

lateral sepals reflexed;

petals narrowly lanceolate-falcate, margins entire;

lip projecting to porrect, lanceolate to narrowly lance-rhombic, without basal thickening, 8–23 × 1–6 mm, margins entire;

spur slenderly conic, 11–27 mm;

rostellum lobes very wide-spreading, angular;

pollinaria nearly straight;

pollinia remaining enclosed in anther sacs;

viscidia suborbiculate;

ovary slender to rather stout, mostly 8–20 mm.

= 42.