Review Article | Published: 07 January 2021

Reappraisal of the genus Cycas L. (Cycadaceae) in Andaman and Nicobar Islands, India

Lal Ji Singh and Dharam Raj Misra

Indian Journal of Forestry | Volume: 43 | Issue: 1 | Page No. 46-57 | 2020
DOI: https://doi.org/10.54207/bsmps1000-2021-513ETJ | Cite this article

Abstract

The genus Cycas is reviewed for Andaman and Nicobar Islands. C. andamanica, C. darshii and C. sainathii have been treated as synonyms of C. pschannae, C. spherica and C. zeylanica respectively. Records of C. darshii from Botanic garden Culcutta have been shown to described on the basis of plant under cultivation and claimed natural population in Andaman and Nicobar Islands without any supportive evidence. A taxonomic note a brief discussion on its distribution is also discussed here. Morpho-anatomical and palynological data of C. zeylanica described here is for the first time. A key to the species of Cycas from the Andaman and Nicobar Islands is also provided.

Keywords

Conservation status, Cycas, Leaflet, Megasporophyll, Pollen grains, Synonyms, Taxonomy

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Fig. 1

A-C Holotype & D-I Apex of megasporophyll. A. Cycas darshii R.C. Srivast. & B. Jana. B. C. sainathii R. C. Srivast, C. C. andamanica K. Prasad, M.V. Ramana, Sanjappa & B.R.P. Rao, D-E. C. dharmrajii L.J. Singh, F-G. C. pschannae R. C. Srivast. & L.J. Singh, H-I. C. zeylanica (J. Schust.) A. Lindstrom & K.D. Hill

Fig. 2

Comparision of megasporophyll. A-C. Cycas dharmrajii L.J. Singh, D-F. C. pschannae R.C. Srivast. & L.J. Singh, G-I. C. zeylanica (J. Schust.) A. Lindstrom & K.D. Hill

Fig. 3

A-F Comparision of anatomy of leaflet. A-B. Cycas dharmrajii, C-D. C. pschannae R.C. Srivast. & L.J. Singh, E-F. C. zeylanica (J. Schust.) A. Lindstrom & K.D. Hill, G-I Pollen grains of C. zeylanica (J. Schust.) A. Lindstrom & K.D. Hill

Fig. 4

Map of the Andaman and Nicobar Islands showing distribution of the species of Cycas

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How to cite

Singh, L.J. and Misra, D.R., 2020. Reappraisal of the genus Cycas L. (Cycadaceae) in Andaman and Nicobar Islands, India. Indian Journal of Forestry, 43(1), pp.46-57. https://doi.org/10.54207/bsmps1000-2021-513ETJ

Publication History

Manuscript Received on 09 April 2020

Manuscript Revised on 15 May 2020

Manuscript Accepted on 20 June 2020

Manuscript Published on 07 January 2021

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