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.

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.

dense to rather lax.

lax to very dense.

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, 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.