World Distribution : Himalaya to Russian Far East and Temperate East Asia, Indo-China, North Sumatera
Literature : Uniyal B.P., Sharma J.R., Choudhery U., Singh D.K. (2007). Flowering Plants of Uttarakhand: A Checklist. Bishen Singh Mahendra Pal Singh: 167; GRIERSON A.J.C. & LONG D.G. (1983). FLORA OF BHUTAN INCLUDING A RECORD OF PLANTS FROM SIKKIM Vol. 2: Part 1. ROYAL BOTANIC GARDEN, EDINBURGH: 357