Epilobium wallichianum Hausskn.

Herbs perennial, erect or ascending, with leafy basal soboles. Stems 15-80 cm tall, simple to well-branched, sparsely strigillose and glandular above, subglabrous below with 4 or rarely 2 raised strigillose lines decurrent from margins of petioles, usually 4-angled. Leaves subleathery, subsessile; cauline blade oblong or elliptic to subovate, 2-6 × 0.6-2.5 cm, subglabrous except for sparsely strigillose margin and midvein, base subrounded or subcordate to broadly cuneate, margin serrulate with 10-25 teeth per side, apex obtuse or acute. Inflorescence and flowers often nodding. Sepals 4-8 mm. Petals pink to rose-purple, 5.5-13 mm. Stigma capitate to broadly clavate, entire. Capsules 3.8-7.5 cm, sparsely strigillose and glandular; pedicels 1-2.5 cm. Seeds brown, 0.9-1 mm, low papillose, with short chalazal collar; coma dull white, detaching easily. Fl. (May-)Jul-Aug, fr. Aug-Sep. 2n = 36.

Gansu, Guizhou, Hubei, Sichuan, Xizang, Yunnan [Bhutan, NE India (Assam, W Bengal, Sikkim), Myanmar, Nepal].

Moist places along rivers, streams, and bogs, and along forest margins in mountains; (1300-)1800-4100 m.

Epilobium duclouxii H. Léveillé; E. mairei H. Léveillé; E. souliei H. Léveillé; E. sykesii P. H. Raven; E. tanguticum Haussknecht; E. wallichianum subsp. souliei (H. Léveillé) P. H. Raven.