Epilobium hirsutum

Erect perennial rhizomatous herb 0.25–2.5 m high, much branched in upper half; stems exfoliating and often woody near base, covered with dense, long spreading hairs and sometimes also with short glandular hairs. Leaves mostly opposite, lanceolate-elliptic to narrowly obovate or narrowly elliptic, 4–12(–23) cm long, 3–40 mm wide, villous, sessile, margins with dense small teeth, base tapering to cordate. Flowers with a conspicuous ring of long white hairs inside the hypanthium; sepals oblong-linear, 6–12 mm long; petals bright pink to dark purple, 9–20 mm long. Capsule 2.5–9 cm long, densely villous, with a mixture of long spreading hairs and short glandular hairs; pedicle 0.5–2 cm long; seeds 0.8–1.2 mm long, papillose, comose.   Flowers Jan.–Mar.