Species Name (as per The IPNI) : Persicaria amphibia (L.) Delarbre
Common name : Longroot smartweed, Water knotweed, Water smartweed, Amphibious bistort
Habit : Herb
Habitat : Ponds, streams, marshes and lakes; 800 - 4500 m. altitude
Flower, Fruit : June-September
Distribution :
Uttarakhand : Uttarakhand
Native : Subarctic and Temperate Northern Hemisphere, Ethiopia to Kenya, South Africa, Bhutan, India
Exotic/Native : Native
World Distribution : Subarctic and Temperate Northern Hemisphere, Ethiopia to Kenya, South Africa, Bhutan, India and Argentina
Literature : Uniyal B.P., Sharma J.R., Choudhery U., Singh D.K. (2007). Flowering Plants of Uttarakhand: A Checklist. Bishen Singh Mahendra Pal Singh: 207; GRIERSON A.J.C. & LONG D.G. (1983). FLORA OF BHUTAN INCLUDING A RECORD OF PLANTS FROM SIKKIM Vol. 1: Part 1. ROYAL BOTANIC GARDEN, EDINBURGH: 161