As part of the ex-situ conservation of the wild ornamental plants at JNTBGRI, several species of Memecylon were collected and introduced from the Western Ghats. While working on the taxonomy of the collected plants, it was found that a well-defined species Memecylon deccanense C.B.Clarke has been reduced recently to the synonym of M.heyneanum Benth. ex Wight & Arn. A detailed study by relevant literature, live and herbarium specimens, and type specimens housed at different herbaria, it is reinstated as a distinct species and a lectotype is designated here. Relevant photographs and images of type specimens of M.deccanense and M.heyneanum also provided to facilitate its easy identification. Memecylon deccanense hence treated here as a distinct species from M. heyneanum.

Madhuca diplostemon (C.B.Clarke) P.Royen, a threatened endemic species of the Western Ghats, is rediscovered in a sacred grove in Kollam district in Kerala, after a hiatus of 184 years since its first collection. A detailed description, photographs and relevant notes are provided.

A new species of Sida, S. keralensis is described with photographs from the southern Western Ghats, Kerala, India. It is morphologically similar to Sida scabrida but clearly distinct by being an undershrub with adpressed stellate hairy stem, discolorous ovate or narrowly ovate to elliptic-ovate leaves with rounded-subcordate base, acute apex and crenate-serrate margins from the base; the linear-lanceolate to slightly falcate stipules, the fairly shorter floral and fruiting pedicels more or less equal to the stipules, fairly long staminal columns and the glabrescent mericarps with stellately pubescent awns.

Madhuca balakrishnanii (Sapotaceae), a new species from Kerala is here described with photographs. It is most closely similar to M. diplostemon and M. insignis but differs in having long stipules, sparsely hairy pedicels, abaxially hairy inner sepals, shorter corolla tubes with oblong lobes, fairly long densely hairy staminal filaments, shorter styles and ovoid fruits. The IUCN conservation status, ecology, distribution and phenology along with a key for the identification of Madhuca species in the Western Ghats is provided.