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, gradually reduced to bracts distally;

blade oblong to linear-lanceolate, 2.7–23 × 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, yellowish green with dull yellowish lip, or more whitish green under cool conditions;

lateral sepals spreading to reflexed;

petals rhombic-ovate- to lance-falcate, margins entire;

lip descending, projecting, or apex adhering to dorsal sepal and petal apices, rhombic-lanceolate to lanceolate, without basal thickening, 2.5–6 × 1–1.5 mm, base not rounded-dilated, margins entire;

spur clavate or sometimes rather cylindric, 2–5 mm, apex usually broadly obtuse;

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

pollinaria straight;

pollinia rotating forward and/or fragmenting, loose pollen masses free of anther sacs and trailing downward onto stigma;

viscidia orbiculate;

ovary rather slender to stout, mostly 5–13 mm.

= 42.