in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 4: 48. 1830 ,
Leaf blades dull, pale green abaxially, shiny, dark green adaxially, leathery, basal blade (1–)2.5–9.5 × (0.4–)1–4.5 cm. Inflorescences pedunculate, 1–12 cm, glandular to stipitate-glandular, proximal branches sometimes remote, especially in fruit; bracts sometimes subtending pedicels, scalelike. Flowers: hypanthium shallowly campanulate, 0.3–0.6 × 1.2–1.8 mm, glandular to stipitate-glandular; sepals triangular to ovate, 0.8–1.5 × 0.7–1.1 mm, margins entire, apex rounded or retuse, glabrous or sparsely stipitate-glandular; petals narrowly spatulate or oblanceolate, 1–2.2 × 0.4–0.7 mm, margins entire; stamens exserted; filaments 0.8–1.5 mm; anthers 1-locular, round to transversely elliptic, 0.1–0.2 × 0.2–0.3 mm, dehiscent by broad, terminal openings; pistils 2–3 × 1–1.8 mm; styles slightly spreading, cylindric. Capsules erect, green, red, or purple, narrowly ovoid, tips divergent, 6–9 mm. Seeds 80–120, 3.2–4.8 × 0.4–0.6 mm, ends tapered. 2n = 14.
Phenology: Flowering Jun–Sep.
Habitat: Wet meadows, stream banks, bogs, seepage areas, wet cliffs and talus slopes, heathlands
Elevation: 0-2300 m
Alta., B.C., N.W.T., Yukon, Alaska, Idaho, Mont., Oreg., Wash.
The Aleuts of Alaska use an infusion of Leptarrhena pyrolifolia leaves to treat influenza, and the Thompson Indians of British Columbia apply a poultice of chewed leaves to wounds (D. E. Moerman 1998).