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.

few, ascending-sheathing, little more than bracts, scarcely reduced distally;

bracts often lacking;

blade ovate to elliptic-ovate, 2.5–6 × 0.7–2 cm.

lax to dense.

lax to rather dense.

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, green to yellowish green;

lateral sepals reflexed or sometimes spreading;

petals ovate- to lance-falcate, margins entire;

lip descending or reflexed, linear to linear-oblong or linear-lanceolate, 6–10(–14) mm, margins entire, often with series of low parallel ridges on adaxial surface;

spur cylindric or tapering toward apex, 9–20 mm, apex usually rather acute;

rostellum lobes somewhat divergent, directed forward, rounded-subangular, rather prominent;

pollinaria straight;

pollinia remaining enclosed in anther sacs;

viscidia orbiculate to broadly elliptic-oblong;

ovary rather slender to stout, mostly 6–12 mm.