Insights into the Gesneriads of Arunachal Pradesh, India: Rhynchoglossum, Epithema, Stauranthera and Whytockia

We carried out taxonomic investigations on four genera (Rhynchoglossum, Epithema, Stauranthera and Whytockia) of the tribe Epithemateae of the family Gesneriaceae in the state of Arunachal Pradesh, India during 2016–2021. This article reports on five species, with brief notes on their habitat, along with color photographs to aid in identification. A taxonomic key is also provided for the genera.