Flora of North America species comparison

several to many, ascending, scattered along stem, imperceptibly reduced to bracts distally;

blade lanceolate to ovate-lanceolate, usually to 20 × 4 cm.

1–3, ascending to spreading, rather abruptly or gradually reduced to bracts distally;

blade lance-oblong to linear-lanceolate, 4.5–32 × 1–3 cm.

lax to moderately dense.

dense.

resupinate, showy, corolla white, calyx green to whitish green;

lateral sepals porrect;

petals obovate to rarely flabellate, apically lacerate;

lip descending to horizontally projecting, deeply 3-lobed, without basal thickening, 14–22 × 15–29 mm, distal margins of lobes deeply incised, fringed, lateral lobes flabellate, usually broad, overlapping middle lobe, middle lobe flabellate, sometimes very broadly, emarginate;

spur slenderly clavate, 28–47 mm;

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

pollinaria geniculate;

pollinia directed forward (column appearing hooded), remaining enclosed in anther sacs;

viscidia orbiculate;

ovary slender, mostly 15–30 mm.

resupinate, showy, pale yellow-orange to pale orange;

dorsal sepal entire or rarely apically dentate;

lateral sepals spreading;

petals elliptic to linear-oblong, margins entire;

lip descending, ovate-elliptic to obovate or oblong, 3–5 × 1.5–4 mm, margins eroded to lacerate or rarely entire, with basal pair of fleshy ridges on adaxial surface;

spur tapering from broad base to slender tube, 5–10 mm;

rostellum lobes curved downward, short, rounded;

pollinaria essentially straight; large pollinia protruding forward;

viscidia orbiculate to suborbiculate;

ovary slender to somewhat stout, 5–11 mm.

= 42.