A contribuição da anatomia foliar para a taxonomia das espécies de Cyperus L. subg. Cyperus (Cyperaceae) ocorrentes no sul do Brasil

Abstract

A contribuição da anatomia foliar para a taxonomia das espécies deABSTRACT -(Contribution of leaf anatomy to the taxonomy Cyperus L. subg. Cyperus (Cyperaceae) species from Southern Brazil). The leaf anatomy of 15 taxa of Cyperus subg. Cyperus from Southern Brazil was analyzed aiming to fi nd anatomic characteristics useful for identifi cation. All the taxa studied have radiate chlorenchyma around the vascular bundles, Kranz anatomy of the Chlorocyperoid type and air cavities with starred cells in the diaphragms.The most important diagnostic characters are leaf-blade shape in cross section, arrangement and stratifi cation of hypoderm and bulliform cells, degree of air-cavity development, and vascular-bundle arrangement. The results were useful to separate some exomorphologically similar species but were not conclusive for the defi nition of all specifi c or infra-specifi c complexes observed. On the other hand, the results reinforced the proposition of synonymies indicated by previous exomorphological analyses and micromorphological data of the fruit surface. The diagnostic value of the analyzed data is discussed and a comparative table is provided.

Comparative anatomy of the leaves of Piper lepturum(Kunth) C.DC. var. lepturum and Piper lepturum var. angustifolium (C.DC.) Yunck.

“…According to Gomes et al (2005), anatomical characters of vegetative organs of Hippocrateoideae species serve as additional subsidies to the external morphology due to the questioning of results with current molecular data, which include Hippocrateaceae within the family Celastraceae (APG 2003). Similarly, other studies were performed with different families, providing contributions for taxonomy and phylogeny (Rio et al 2005, Gomes et al 2009, Hefler & Longhi-Wagner 2010, Mantovani et al 2010.…”

Do leaves in Cyperoideae (Cyperaceae) have a multiple epidermis or a hypodermis?

“…Cyperus have been described and termed hypodermis (Hefler and Longhi-Wagner, 2010;Metcalfe, 1971). Cyperus ligularis studied here is included in Cyperus subg.…”

Cyperus prophyllatus: An endangered aquatic new species of Cyperus L. (Cyperaceae) with a exceptional spikelet disarticulation pattern among about 950 species, including molecular phylogenetic, anatomical and (micro)morphological data

“…The images were captured using a SEM (Jeol JSM 7001S) under 15 KV at the Electronic Microscope Laboratory of the University of Brasília. The descriptive terminology followed Ellis [ 56 ], Haines & Lye [ 19 ], Hefler & Longhi-Wagner [ 57 ], and Shalabi & Gazer [ 58 ].…”