Platanthera obtusata ssp. obtusata

General:
Perennial herb, from a few fleshy-tuberous roots; stems 10-30 cm tall, without leaves.

Leaves:
Single basal leaf, oblanceolate to elliptic or egg-shaped, 5-15 cm long, 1-5 cm wide, blunt-tipped, long-tapering to base.

Flowers:
Inflorescence a terminal, loosely 3- to 15-flowered spike, bracted; flower bracts green and up to 15 mm long below, yellowish and much reduced above; flower stalks 1-5 mm long; flowers pale green to yellow-green, sometimes the lip or petals whitish; lower sepals 4-6 mm long, elliptic-lanceolate, somewhat bent back, the upper sepal kidney-shaped to nearly round, 3-4 mm long, somewhat erect, arching over column; petals broadly lanceolate, curved upward, contacting the upper sepal; lip 5-10 mm long, lance-linear, greenish-white, hanging downward with slightly up-curved tip; spur slender, pointed, tapering from base, somewhat curving, as long as lip; column 2-3.5 mm long.

Fruits:
Capsules, erect, ellipsoid, to 10 mm long.

Source:  The Illustrated Flora of British Columbia