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.

1–4, wide-spreading to ascending, scattered along stem, gradually to abruptly reduced to bracts distally;

blade linear-lanceolate, linear-oblong, or oblong-obovate, 7–23 × 0.7–5 cm.

lax.

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.

resupinate, not showy to inconspicuous, whitish green or yellowish green, lip often paler;

lateral sepals reflexed;

petals linear to narrowly oblong-spatulate, margins entire or apex rarely slightly lacerate;

lip descending, without basal thickening, deeply 3-lobed, 10–17 × 13–17 mm, lobes extensively and deeply divided, commonly into filiform divisions, margins rarely merely fringed or middle lobe merely lacerate-fringed, lateral lobes narrowly to broadly cuneate, middle lobe cuneate-flabellate, usually narrow;

spur slenderly to markedly clavate, 11–23 mm;

rostellum lobes nearly parallel, directed downward, short, rounded;

pollinaria nearly straight;

pollinia remaining enclosed in anther sacs;

viscidia linear;

ovary slender to stout, mostly 8–20 mm.

= 42.