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.

(1–)2(–4), spreading, subopposite toward base of stem;

bracts (0–)1(–2) distally;

blade elliptic, lanceolate, to suborbiculate, 2–9 × 0.9–4 cm.

lax.

rather lax to 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.

incompletely resupinate, inconspicuous, greenish;

lateral sepals porrect;

petals broadly ovate, margins entire;

lip projecting forward, concave, orbiculate, ovate, or elliptic, without basal thickening, 1.5–2.5 × 1.2–2 mm, margins entire;

spur stoutly cylindric to saccate, obtuse, 0.7–1.25 mm;

rostellum lobes spreading, directed downward, minute, obscure;

pollinaria straight;

pollinia evidently remaining enclosed in anther sacs;

viscidia oblong to suborbiculate-quadrangular;

ovary rather stout, mostly 2–4 mm.

= 42.