UW Burke Herbarium species comparison

Leaves few to several, becoming reduced to bracts towards inflorescence;

blade oblong to narrowly lanceolate, 2.7-23 cm long and 0.4-4 cm broad, somewhat folded lengthwise, base sheathing stem.

1-3, basal, up to 20 cm. long and 3.5 cm. broad, oblanceolate and tapering to the sheathing base.

A many-flowered, spicate raceme up to 8 cm. long;

scapes bracteate, the bracts lanceolate, often exceeding the lower flowers.

Inflorescence a terminal spike, sparse to very dense;

flowers resupinate, light green to light yellowish green, with dull yellowish lip, or whitish green when conditions are cool;

lateral sepals spreading or bent strongly away from flower center;

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

labellum bent strongly downward, or extending forward, or apex adhered to apexes of dorsal sepal and petals, rhombic-lanceolate to lanceolate, not thickened basally, 2.5-6 cm long and 1-1.5 mm broad, base not rounded-dilated, margins entire;

spur thicker at apex than base or somewhat cylindric, 2-5 mm;

rostellum lobes diverging and directed downward, minute, rounded;

pollinaria 2, straight;

pollinia 2, turning forward, may be fragmenting, masses of pollen loose and free of anther sacs, trailing down onto stigma, stigma entire;

viscidia orbiculate, free;

ovary slender to stout, usually 5-13 mm.

Sepals thin, greenish-white, 3.5-5 mm. long, 1-nerved, the upper one erect, triangular-lanceolate, the lateral pair oblong-lanceolate and somewhat reflexed;

petals about the same length as the upper sepal, greenish or white with a green median stripe, erect;

lip fleshy, white, lanceolate, slightly hastate at the base and partially fused with the lateral sepals and petals;

spur slender, tapering from the base, 2-3 times as long as the lip, pale green at the base, darker green at the tip;

stamens and style fused to form a column 1.5 mm. long.

Capsules.