Bistorta macrophylla

Bistorta macrophylla (syn. Polygonum macrophyllum, syn. Persicaria macrophylla) is a flowering plant species in the buckwheat family Polygonaceae.^[1] It is native to mountain regions of West and South China (Gansu, Guizhou, Henan, Hubei, Qinghai, Shaanxi, Sichuan, Tibet, Yunnan), Bhutan, Nepal,^[2] northern India (Himachal Pradesh, Uttarakhand), and Pakistan.

Bistorta macrophylla
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Polygonaceae
Genus:	Bistorta
Species:	B. macrophylla
Binomial name
Bistorta macrophylla (D.Don) Sojak, 1974
Synonyms
Persicaria macrophylla (D.Don) Cubey Polygonum macrophyllum D. Don Bistorta sphaerostachya (Meisn.) Greene Polygonum sphaerostachyum Meisn.

In Nepal, its rhizomes are dried to be used as food.^[3]

In India (Uttarakhand), its leaves are used in traditional medicine to treat wounds.^[4] The paste made from the roots is given to infants for stomach problems.^[5]

Vernacular names:

• English: red knotweed or large leaved knotweed
• Chinese: 圆穗拳参; pinyin: yuan sui quan shen
• Nepali: Dalle ghans, Dalle jhar^[3]
• India: Kukhri,^[4] Chhota ninayin, Kande-re-ninai^[5]

Compounds (-)-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.^[6]