A synopsis of the genus Commelina in Andaman and Nicobar Islands is presented with one new species and three new records. The new species, C. andamanica is remarkable by its trailing habit without a definite base, solitary and terminal, cucullate spathe with a single cincinnus and two smooth seeds within a capsule. Of the seven species of Commelina recorded, C. attenuata, C. clavata and C. longifolia are new to the islands. An identification key to all the species reported from Andaman and Nicobar Islands is also provided.
Oberonia swaminathanii, a new species of Orchidaceae from Wayanad district, Kerala, India is described and illustrated. The new species resembles Oberonia balakrishnanii, O. chandrasekharanii and O. seidenfadeniana by its 3‐lobed labellum and 2‐lobuled midlobe; but differs in having brick‐red coloured flowers, triangular labellum disc, and a subglobose column.
Impatiens stolonifera, a new scapigerous species of Balsaminaceae from the southern Western Ghats, is described and illustrated. The new species is morphologically allied to Impatiens scapiflora, but differs by having a stoloniferous tuber and white flowers with conspicuously long and broad spur.
Two new species of Eriocaulon L. (Eriocaulaceae) from India, E. malabaricum Pradeep & Nampy and E. pykarense Nampy & Manudev, are described, illustrated and compared with E. sollyanum Royle and E. ansarii Pradeep & Sunil, respectively.
Eriocaulon biappendiculatum, a new species of Eriocaulaceae from the southern Western Ghats, India, is described and illustrated. The new species is close to Eriocaulon nairii but differs in having 5–17 peduncles, free male sepals, and both continuous ribbon-like and setiform appendages on the seeds.
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