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, prostrate, ephemeral, basal;

blades sessile, lanceolate to oblanceolate, 7.5-32 cm long and 1-8.4 cm broad, barely folded along midvein;

cauline bracts linear-lanceolate.

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 a sparsely to densely flowered raceme, 6-70 cm;

rachis typically longer than peduncle;

bracts 3-23 mm;

flowers green, sometimes slightly translucent;

fragrance emits at night but lingers during day, faint, musky to honeylike;

sepals 2-6 mm long and 1-3 mm broad;

dorsal sepal ovate to oblong;

lateral sepals spreading to strongly curving outward, oblong-lanceolate to oblong;

petals erect-spreading or projecting, generally straight sided, unevenly ovate to narrowly lanceolate, 2-5.5 mm long and 0.6-2 mm broad, inner margins form a U shape;

labellum somewhat bent downward, widely ovate to narrowly elliptic, 2-5 mm long and 1-3 mm broad, apex commonly curving upward slightly;

spur horizontal to curving downward, 2-5.5 mm, approximately equal to labellum;

viscidia widely elliptic-ovate, 0.15-0.5 mm long and 0.1-0.3 mm broad;

rostellum blunt.

Capsules 3.5-10.5 mm;

seeds tan to cinnamon brown.