Impatiens tatoensis (Balsaminaceae): a new species from Arunachal Pradesh, Northeast India and notes on lectotypification of the name I. spirifera Hook.f. & Thomson

Impatiens tatoensis Gogoi & W.Adamowski, a new species from Northeast India with affinities to I. spirifera Hook.f. & Thomson is described and illustrated. We provide a lectotypification for the name I. spirifera Hook.f. & Thomson as well as a description and illustrations of the species