Nelumbo - The Bulletin of the Botanical Survey of India

Sarojini G. Panigrahi ¹

Affiliations
1 Calcutta, IN

Abstract

A taxonomic resume of the generic concepts involved in Rotala L., Ammannia (Houst.) L., Nasaea Comm. ex Kunth and Hionanthera Fernandes & Diniz, from the time of Linnaeus (1753) to Cook et al. (1974) and detailed descriptions of the four genera, based on gross external morphology and their geographical range, are presented and discussed. The nomenclature and distribution of 30 species undertaken for biosystematic studies are provided. A comprehensive key synthesising characters derived from such multi-directional evidence, is formulated for more rational delimitation of the four genera.

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Sarojini G. Panigrahi ¹

Affiliations
1 A 13/3, Kalindi Housing Estate, Calcutta-700 089, IN

Abstract

Anatomical work done on the genus Rotala L. is reviewed and studies on the anatomy of adult stems and leaves and the SEM of the cuticle and stomata on leaves of 10 species Rotala L., are presented. A 'key' based on anatomical features of diagnostic value is formulated to recognise the species from each other and the impact of such evidence on the infrageneric relationship, is discussed.

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