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Re-establishment of Plectranthus bishopianus (Lamiaceae) based on morphological and micromorphological data

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Abstract

Plectranthus bishopianus has recently been treated as a synonym of Plectranthus deccanicus. However, a detailed study of the type materials, recently collected specimens, as well as SEM analysis of pollen and mericarp of both species suggests that P. bishopianus is a distinct species. The specific status of P. bishopianus is thus reinstated, and it can be easily distinguished from P. deccanicus by the stem nature, leaf size and shape, cyme length, number of flowers per cyme, the structure of flowering and fruiting calyx and mericarp surface. Additionally, complete taxonomic descriptions, photographs and conservation assessments, along with notes on distribution and habitat of both species, are provided.

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Acknowledgements

The authors are grateful to the Forest Department, Kerala State, for permission to undertake field studies in protected areas. We are grateful to curators of CAL, CALI, JCB, FRLH, K, KFRI, MH, RHT and TBGT. We would like to thank Gurukula Botanical Sanctuary assistance in collection of plant specimens. KS thanks Kerala State Council for Science, Technology & Environment, Government of Kerala, for the research fellowship and PS thanks the Department of Biotechnology (BT/PR5423/BCE/8/907/2012), Government of India, for the financial support.

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Authors and Affiliations

  1. Department of Botany, University of Calicut, Malappuram, Kerala, 673 635, India

    Kokkaraniyil Smitha & Purayidathkandy Sunojkumar

  2. The Herbarium, Royal Botanic Gardens, Kew, Richmond, TW9 3AB, UK

    Alan Paton

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  1. Kokkaraniyil Smitha
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  2. Alan Paton
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Correspondence to Purayidathkandy Sunojkumar.

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Smitha, K., Paton, A. & Sunojkumar, P. Re-establishment of Plectranthus bishopianus (Lamiaceae) based on morphological and micromorphological data. Plant Syst Evol 304, 807–816 (2018). https://doi.org/10.1007/s00606-018-1511-6

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