UW Burke Herbarium species comparison

Leaves usually 2, opposite and basal, subsessile, spreading and usually lying on the ground, fleshy, suborbicular to oblong-elliptic, 6-16 cm. long and 3-14 cm. wide, rounded;

scape usually with 1-3 small bracts about midlength.

Leaves few to several, abruptly spreading or occasionally ascending, dispersed along stem and becoming reduced to bracts towards inflorescence;

blades folded slightly lengthwise, oblong to ovate to linear-lanceolate, 3-32 mm long and 1-4.5 cm broad.

Inflorescence a loose raceme with floral bracts 7-12 mm. long, green, linear to lanceolate;

flowers 5-25, pale to deep greenish-white or yellowish, with pedicles 3-7 mm. long; upper sepal erect, reniform to broadly ovate, 4-8 mm. long and broad, rounded, entire to shallowly lobed near the tip; lower sepals obliquely triangular-ovate, slightly reflexed, 8-13 mm. long;

petals paler than the sepals, often nearly white, narrower and shorter than the lower sepals, rounded, reflexed;

lip white, strap-shaped, pendant, slightly upturned at the tip, 2-4 mm. broad and 10-20 mm. long;

spur club-shaped, strongly curved, 15-25 mm. long, pale and translucent near the base, the tip greenish;

stamens and style fused to form a column 4-5 mm. long with 2 lateral projections 3-5 mm. long.

Inflorescence sparsely- or densely-flowered spike;

flowers resupinate, light yellowish green to light green, not showy;

lateral sepals spreading to curving backward;

petals ovate-falcate to lance-falcate, margins entire;

labellum bent downward or extending forward, linear to lanceolate, basal thickening absent, 3-9 mm long and 1-3 mm broad or less;

spur distinctly club-shaped, capitate inflated or pouch-shaped, 2-6 mm, apex obtuse;

rostellum lobes parallel to convergent, directed downward, minute, rounded, not easily seen;

pollinaria 2, not curved;

pollinia 2, remaining within anther sacs;

viscidia free, orbiculate;

stigma entire;

ovary slender to stout, generally 5-10 mm.

Capsules ellipsoid to cylindric.