Flora of North America species comparison

(1–)2–3(–4), spreading to ascending, gradually to rather abruptly reduced to bracts distally;

blade lanceolate to elliptic-oblong, 5–35 × 1–7 cm.

2, in subequal basal pair, spreading-ascending or lying on ground;

bracts 0(–1, very rarely);

blade orbiculate, broadly elliptic, or obovate, 5–17 × 4–13 cm.

lax to dense.

lax.

resupinate, inconspicuous, yellowish green;

lateral sepals porrect to reflexed;

petals oblong-orbiculate to ovate, apex somewhat crenulate;

lip descending to commonly reflexed, 2–6 × 1.8–5 mm, base auriculate, with prominent central tubercle, distal margin entire to slightly crenulate;

spur cylindric to strongly clavate, 4–8(–11) mm, apex rarely 2-lobed;

rostellum lobes mostly parallel to slightly diverging, directed downward, minute, obscure;

pollinia remaining enclosed in anther sacs;

viscidia mostly quadrangular, oblong-quadrangular, orbiculate, or broadly asymmetric, commonly canaliculate to nearly cylindric and difficult to assess;

ovary rather slender to stout, mostly 8–10 × 2 mm.

resupinate, not showy;

calyx green;

corolla commonly yellowish green;

lateral sepals reflexed;

petals narrowly lanceolate-falcate, margins entire;

lip projecting to porrect, lanceolate to narrowly lance-rhombic, without basal thickening, 8–23 × 1–6 mm, margins entire;

spur slenderly conic, 11–27 mm;

rostellum lobes very wide-spreading, angular;

pollinaria nearly straight;

pollinia remaining enclosed in anther sacs;

viscidia suborbiculate;

ovary slender to rather stout, mostly 8–20 mm.

= 42.