Botanical name: Epilobium amurense subsp. amurense Family: Onagraceae (Evening primrose family)
Synonyms: Epilobium amurense subsp. laetum, Epilobium nepalense
Amur Willow-Herb is a rising perennial herb, with white flowers. It is named for Amur River in the region of Russia and China. Inflorescence is erect, dense bristly. Sepals are 3.5-5 mm long, sparse to dense bristly. Petals 5-7.5 mm long, white, notched. Style is 3-4 mm long, stigma head-klike to short club-shaped, surrounded by the anthers before anthesis. Stems are 15-50 cm tall, simple or sparsely branched, the raised lines decurrent from the margins of the leaf-stalks markedly bristly, sparse to dense bristly velvet-hairy, with glandular hairs mixed on the inflorescence. Leaves are narrow elliptic to narrow ovate, the lower ones obovate, 2.5-7 x 1.2-3 cm, finely toothed to sharply sawtoothed, sparsely bristly, somewhat pointed, the base wedge-shaped to leaf-stalk 3-6 mm long. Capsules 5-7.5 cm long, bristly, flower-stalks 1-1.5 cm long. Amur Willow-Herb is found in the Himalayas, from Kashmir to Nepal, NE India, Yunnan, continuing to Japan and Siberia, at altitudes of 1300-4200 m.
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