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 to arcuate-spreading, scattered along stem or clustered at base, sometimes in basal rosette, gradually reduced to bracts distally;

blade elliptic-oblong to ovate-oblong or linear-lanceolate, 3–14 × 0.4–4 cm.

lax.

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, yellowish or perhaps whitish green;

lateral sepals spreading to slightly reflexed;

petals ovate-falcate, margins entire;

lip descending, usually ovate with abruptly dilated base or occasionally lanceolate with less prominent dilation, without basal thickening, 4–5.5(–6) × (1.5–)2–2.5 mm;

spur clavate, somewhat tapering toward obtuse apex, 4–6 mm;

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

pollinaria straight;

pollinia often protruding from anther sacs, commonly fragmenting and pollen masses trailing onto stigma;

viscidia linear to linear-oblong;

ovary rather slender to stout, mostly 6–10 mm.

= 84.