Species Name (as per The IPNI) : Persicaria longiseta (Bruijn) Kitag.
Common name : Oriental Lady's Thumb, Asiatic smartweed, Bristled knotweed, Bunchy knotweed
Habit : Herb
Habitat : Meadows, marshes, mudflats, riverbanks, floodplains, and lowland
Comments / notes : A common weed of rice paddies.
Flower, Fruit : May-August
Distribution :
Uttarakhand : Uttarakhand
Native : China, India, Japan, Jawa, Khabarovsk, Korea, Kuril Is., Manchuria, Myanmar, Nepal, Pakistan, Philippines, Primorye, Sakhalin, Taiwan, West Himalaya
Exotic/Native : Native
World Distribution : Pakistan to Russian Far East, Philippines and Alabama, British Columbia, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Brunswick, New Jersey, New York, North Carolina, Ohio, Ontario, Pennsylvania, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin
Literature : Uniyal B.P., Sharma J.R., Choudhery U., Singh D.K. (2007). Flowering Plants of Uttarakhand: A Checklist. Bishen Singh Mahendra Pal Singh: 208