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RESEARCH ARTICLE
Contents Vol 57(2)

Foliar anatomy of the subfamily Myrtoideae (Myrtaceae)

C. M. V. Cardoso A B , S. L. Proença A and M. G. Sajo A
+ Author Affiliations
- Author Affiliations

A Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista – UNESP, C.P. 199, 13506-900, Rio Claro, SP, Brazil.

B Corresponding author. Email: cmviana@hotmail.com

Australian Journal of Botany 57(2) 148-161 https://doi.org/10.1071/BT07176
Submitted: 21 September 2008  Accepted: 16 February 2009   Published: 11 May 2009

Abstract

The foliar structure of 44 species of Myrtoideae Nied. (Myrtaceae) was described to characterise the anatomy of the leaves in this subfamily and also to recognise particular features in each genus and/or subtribe. In the present study, nine genera of the subtribe Myrtinae, five genera of the subtribe Myrciinae and eight genera of the subtribe Eugeniinae were examined. All of them have dorsiventral and hypostomatic leaves, with stomata slightly protruded in relation to other epidermal cells; the leaves also present secretory cavities, idioblasts containing druses and vascular bundles with phloem on both adaxial and abaxial sides. Some surface features have diagnostic value for all genera of these three subtribes, such as the percentage of palisade parenchyma, the presence or absence of an adaxial hypodermis, the occurrence of an extension to the vascular bundle sheath, and the shape and position of the vascular system of the midrib. These features are described for each of the species studied and the results are discussed in a taxonomical context.


Acknowledgements

We thank CAPES (Comissão de Aperfeiçoamento de Pessoal de Nível Superior, Brasil) for the doctoral fellowship (for C. M. V. Cardoso) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasil) for the Researcher fellowship (for M. G. Sajo). We also thank Projeto Biota – FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) for financial support.


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