Bistorta macrophylla is a flowering plant species in the genus Bistorta native to mountain regions of West China (Gansu, Guizhou, Henan, Hubei, Qinghai, Shaanxi, Sichuan, Xizang, Tibet, Yunnan), Pakistan, Bhutan, North (Himachal Pradesh, Uttarakhand) and West India (Western Ghats) and Nepal.
In Nepal, its rhizomes are dried to be used as food.
- English: red knotweed or large leaved knotweed
- Chinese: 圆穗拳参 yuan sui quan shen
- Nepali: Dalle ghans, Dalle jhar, मेfन्जा Monza
- India: Kukhri, Chhota ninayin, Kande-re-ninai
(-)-Epicatechin-5-O-beta-D-glucopyranoside, (+)-catechin-7-O-beta-D-glucopyranoside, 1-(3-O-beta-D-glucopyranosyl 4,5-dihydroxy-phenyl)-ethanone, (-)-epicatechin, chlorogenic acid and gallic acid can be found in the species.
- Persicaria bistorta, a similar looking species described in Europe, that may be synonymous to B. macrophylla
- Ethnobotanical studies in Central Nepal: The preservation of plant-foods. N.K Bhattarai, Contribution to Nepalese studies, CNAS, Tribhuvan University, July 1991, Vol. 18, No. 2 (article)
- Worth of Traditional Herbal System of Medicine for Curing Ailments Prevalent Across the Mountain Region of Uttarakhand, India. Prakash Chandra Phondani, Journal of Applied Pharmaceutical Science, 2011, 01 (09), pages 81-86 (article)
- Current Concepts In Botany. K. G. Mukerji and C. Manoharachary, 2006 (book)
- Studies on chemical constituents from Polygonum macrophyllum. Wang S, Wang D and Feng S, Zhong yao cai (Zhongyaocai = Journal of Chinese Medicinal Materials), 2004, 27(6), pages 411-413, PubMed