Abstract
Foliar epidermal features of 18 species of Euphorbia L. s.l. (Euphorbiaceae) are studied. While the anisocytic and anamocytic stomata are common in herbaceous members (Euphorbia subg. Chamaesyce), the paracytic type is predominant in succulent species (Euphorbia proper). The stomatal types, index and frequency, and the types of trichomes are explored on vegetative as well as floral parts to evaluate their possible taxonomic importance.DOI: http://dx.doi.org/10.3329/bjpt.v20i1.15462Bangladesh J. Plant Taxon. 20(1): 27-38, 2013 (June)
Highlights
Sufficient interest seems to have been revived during the past two decades on the role of internal organization of the individual organs of plants
In view of the above considerations, it was thought worthwhile to investigate the epidermology of the important genus Euphorbia L. s.l., with 84 species occurring in India (Binojkumar and Balakrishnan, 2007, 2010)
These can be found in E. cristata (Fig. 3A), E. elegans (Fig. 3B), E. hirta (Fig. 3E), E. indica (Fig. 3G), and E. prostrata (Fig. 3D) of subg
Summary
Sufficient interest seems to have been revived during the past two decades on the role of internal organization of the individual organs of plants. Leaves occupy a prominent position in this regard and their various features such as venation, stomata and trichomes were found useful in solving taxonomic and phylogenetic issues. The great diversity in habit and adaptation exhibited by the species of the genus Euphorbia provide the added impetus for undertaking the present study. The structural diversity and distribution of trichomes are significant for taxonomic analysis, especially in tropical plants (Stace, 1965; Dilcher, 1974; Rao and Raju, 1985). To fill the gaps in our knowledge in this regard concerning the genus Euphorbia sensu Linnaeus in India, the present study was undertaken. It is intended to view whether these data support the realignments in the genus Euphorbia by Yang et al (2012) with regard to the traditional subgenera Eremophyton and Poinsettia
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