Flora of North America species comparison

few–several, ascending, scattered along stem, gradually reduced to bracts distally;

blade oblong to linear-lanceolate, 5–30 × 0.6–7 cm.

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

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

very lax to very dense.

lax to moderately dense.

resupinate, not showy but sometimes conspicuous, whitish green;

corolla often whiter than calyx;

lateral sepals spreading to slightly reflexed;

petals ovate- to lance-falcate, margins entire;

lip descending or apex adhering to dorsal sepal and petal apices, lanceolate to nearly linear, without basal thickening, 5–12 × 2–4 mm, base slightly to rather markedly rounded-dilated, margins entire;

spur slenderly cylindric to clavate, 4–12 mm, apex usually slenderly tapered;

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

pollinaria straight;

pollinia remaining enclosed in anther sacs;

viscidia oblong;

ovary rather slender to stout, mostly 6–15 mm.

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.

= 84.

= 42.