Epilobium hornemannii Reichenb.

Hornemann's Willow-herb

Habitat: Damp rocks, margins of small brooks. [Alpine or subalpine (non-forested, upland)]

Range: Arctic America south to Labrador and Newfoundland, Gaspé, Cape Breton, mountains of fb88, New Hampshire, New York, Colorado, Utah, Nevada and California. Also Greenland, Iceland, Scandinavia, northeast Asia.

Aids to Identification: Hornemann's willow-herb is a matted perennial with slender stems, 0.5-4.5 cm. It usually has five pairs of thin, smooth, slightly toothed ovate leaves 1.5-5 cm long, 0.1-2.5 cm broad, on short petioles. Its flowers have four pink petals, 5-8 mm long. The slender seed pods are sparsely pubescent, 2-7 cm. The seeds, under a magnifying glass, are distinctly pebbled.

Ecological characteristics: Other than its restriction to damp places, usually along streams, very little is known about the ecology of this species.

Phenology: Flowers July - August.

Family: Onagraceae

Synonyms: Represented in fb88 and New England by ssp. hornemanii. Synonyms include Epilobium alpinum L. var. nutans Hornem.

Known Distribution in fb88: This rare plant has been documented from a total of 6 town(s) in the following county(ies): Franklin, Piscataquis.

Reason(s) for rarity: Disjunct from principal range, possible scarcity of suitable habitat.

Conservation considerations: Populations could be threatened by heavy recreational (hiking) use.