Botanical name: Epilobium tibetanum Family: Onagraceae (Evening primrose family)
Tibetan Willow-Herb is an erect or prostrate, perennial herb, with rhizome with dense, fibrous rootlets. Stems are 13-100 cm tall, well-branched, sparsely hairy throughout upper stem, hairless below with indistinct raised lines decurrent from margins of leaf-stalks. Leaves are somewhat leathery, carried on 2-5 mm long leaf-stalks. Stem-leaves are lanceshaped to narrowly ovate, 1.2-6.5 cm long, 0.5-1.5 cm broad, hairless with sparsely hairy margin and veins, base wedge-shaped or rounded, margin toothed with 15-35 teeth per side, tip pointed to long-pointed. Inflorescence and flowers are upright. Flower-stalks are 0.8-2.5 cm. Sepals are are 3.5-5 mm, keeled. Petals are pink or rose-purple, rarely white, 5-8 mm. Stigma is round or broadly club-shaped, entire. Capsules are 4-8.8 cm, sparsely hairy. Tibetan Willow-Herb is found in Western Himalaya from northeastern Afghanistan and the Murree Hills to western Nepal, the Chumpi Valley and the vicinity of Lhasa, Tibet, at altitudes of 2300-4500 m. Flowering: July-September.
Identification credit: Gurcharan Singh
The flower labeled Tibetan Willow-Herb is ...