The genus Henckelia Sprengel (1817: 402) was re-established by Weber & Burtt (1997), with approximately 180 species, to include most of the Malesian, Sri Lankan and south Indian species of Didymocarpus Wallich (1819: 378). Weber et al. (2011) and Middleton et al. (2013) based on molecular data redefined the genus and included only 56 species. Subsequently three more species were added to the genus, H. pradeepiana Nampy, Manudev & Weber in Manudev et al. (2012: 119), H. sivagiriensis (Rajakumar et al. 2009: 481) Kumar (2014: 149) and H. bracteata Janeesha & Nampy (2015: 53) while Middleton et al. (2015) transferred H. smitinandii ( Burtt 2001: 89) Middleton & Möller in Weber et al. (2011: 776) to the genus Chayamaritia Middleton & Möller (2015: 1961). At present the genus includes 58 species distributed in Sri Lanka, southern and northeastern India, Nepal, Bhutan, southern China, northern Vietnam, northern Laos and northern Thailand.
The genus Henckelia Spreng. (Gesneriaceae) in South India is revisited based on field and herbarium data. Fifteen species are recognized. Henckelia wayanadensis is described new to science while Didymocarpus lyratus Wight var. protractus C.B.Clarke and Henckelia sivagiriensis (Rajakumar, Selvak., S.Murug. & Chellap.) E.S.S.Kumar are reduced to synonymy of Henckelia lyrata (Wight) A.Weber & B.L.Burtt and Henckelia wightii (C.B.Clarke) A.Weber & B.L.Burtt respectively. Lectotypification of seven names are carried out in this paper. Detailed descriptions, illustration/ photographic images and key for the identification of South Indian species are provided.
The genus Pollia consisting of five species in India is revised based on field and herbarium studies. Detailed descriptions, illustrations, photoplates and key to the identification of Indian species are provided. Six names viz., Aclisia indica, Pollia pentasperma, P. secundiflora, P. subumbellata, P. thyrsiflora and P. aclisia var. robusta are lectotypified.
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