Flora of North America species comparison

2, in subequal basal pair lying on ground;

bracts (very rarely, 0–)1–6, scattered along stem;

blade broadly elliptic, orbiculate, or oblate, 7–24 × 5–19 cm.

few–several, ascending, scattered along stem, gradually reduced to bracts distally;

blade oblong to linear-lanceolate, 5–30 × 0.6–7 cm.

lax.

very lax to very dense.

resupinate, rather showy;

calyx mostly greenish white;

corolla mostly white;

lateral sepals reflexed to somewhat spreading;

petals lanceolate-falcate, margins entire;

lip descending to somewhat reflexed, linear-oblong to linear-lanceolate, without basal thickening, 10–23 × 1–2.5 mm, margins entire;

spur slenderly clavate, 28–46 mm;

rostellum lobes directed strongly forward, wide-spreading, angular;

pollinaria nearly straight, (4.6–)4.7–6.8 mm;

pollinia remaining enclosed in anther sacs;

viscidia orbiculate;

ovary slender to rather stout, mostly 16–29 mm.

resupinate, not showy but sometimes conspicuous, whitish green;

corolla often whiter than calyx;

lateral sepals spreading to slightly reflexed;

petals ovate- to lance-falcate, margins entire;

lip descending or apex adhering to dorsal sepal and petal apices, lanceolate to nearly linear, without basal thickening, 5–12 × 2–4 mm, base slightly to rather markedly rounded-dilated, margins entire;

spur slenderly cylindric to clavate, 4–12 mm, apex usually slenderly tapered;

rostellum lobes divergent, directed downward, very small, obscure, rounded;

pollinaria straight;

pollinia remaining enclosed in anther sacs;

viscidia oblong;

ovary rather slender to stout, mostly 6–15 mm.

= 84.