The genus Isodon (Schrad. ex Benth.) Spach (Lamiaceae: Nepetoideae: Ocimeae: Isodoninae) in India is represented by about 22 taxa distributed mostly in eastern and peninsular India (Anonymous 2020; Ranjan et al. 2022). During an exploration of Gangtok flora, an interesting species of the genus Isodon was collected from Daragaon region of Tadong, Gangtok, Sikkim. The striking characteristics of the species like red colored flowers on lax inflorescence were readily attractive. On further morphological examination, consultation of relevant literature (Ranjan et al. 2022; Wangchuk 2024) and herbarium consultation (CAL) revealed its identity as Isodon neorensis Ranjan, G. Krishna & Anant Kumar (2022). Isodon neorensis was recently described from Neora Valley National Park, Darjeeling, West Bengal based on the morphological characters. The species was not yet recorded from the state (Anant Kumar 2024 pers. comm.). The detailed description with notes on some variations, color plate is provided here for easy identification.