General:
Perennial herb from widespread rhizome-like root; stems erect, 1-3 m tall, usually simple, glabrous except for fine minute hairs in the inflorescence and on the ovaries.

Leaves:
Alternate, narrowly lanceolate, (5) 10-15 (20) cm long, entire or finely toothed, green, veiny below; nearly stalkless.

Flowers:
Inflorescence a many-flowered, terminal raceme, elongating, flowers nodding in bud; hypanthium practically lacking; petals 8-20 mm long, the upper 2 wider than lower 2, deep pink to magenta, rarely white; sepals narrowly lanceolate, 7-16 mm long; anthers 1.5-2.2 mm long; ovaries 0.8-1.8 cm long, densely short-hairy; styles longer than the stamens, hairy on the lower portion; stigmas 4-lobed.

Fruits:
Capsules, 4-10 cm long, densely short-hairy; seeds spindle-shaped, 1-1.3 mm long, surface irregularly netted, tuft of soft hairs persistent, 9-14 mm long, white; stalks 7-20 mm long.

Notes:
Two sympatric subspecies occur in BC:

1. Leaves long and gradually tapering to the tip, nearly unstalked, often less than 2 cm wide and 10 cm long; midrib glabrous beneath....................... ssp. angustifolium

1. Leaves blunt to sharp-pointed (rarely gradually tapering), with stalks 1-7 mm long, mostly over 2 cm wide and 10 cm long, midrib glabrous to hairy beneath.................... ssp. circumvagum Mosquin

Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Epilobium angustifolium L.