naa a22 4500 510745725 CHVBK 20180411083045.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12228-012-9263-z doi (NATIONALLICENCE)springer-10.1007/s12228-012-9263-z Anatomy of scapes, bracts, and leaves of Paepalanthus sect. Diphyomene (Eriocaulaceae, Poales) and its taxonomic implications [Elektronische Daten] [Paula Alves, Vera Scatena, Marcelo Trovó] Paepalanthus sect. Diphyomene comprises 18 species with a convoluted taxonomic history. Aiming to correlate anatomical structures with the systematics of this group and its relatives, we studied the anatomy of scapes, reproductive axis bracts, and leaves of 20 Paepalanthus species. Bracts and leaves show differences in epidermal cell thickening; mesophyll width; vascular bundle arrangement; presence or absence of a hypodermis; types of cells in the vascular bundle sheath extensions; margin shape and composition; and presence or absence of aquiferous parenchyma. Scapes differ in contour, rib number, and pith size. Some diagnostic characters found are presence of aquiferous parenchyma and absence of vascular bundle sheath extensions in leaves of P. urbanianus; vascular bundles decreasing in size towards the margin of leaves and bracts, and scapes with a triangular contour in P. flaccidus; scapes with nine ribs in P. acanthophyllus and ten in P. macer. All anatomical features are summarized in tables. These results aid in the identification and characterization of the species of P. sect. Diphyomene. They also support the current section circumscription, reinforcing the relevance of the anatomical characters in order to define natural groups. The New York Botanical Garden, 2012 Morphology nationallicence Poales nationallicence taxonomy nationallicence Alves Paula Laboratório de Anatomia Vegetal, Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho”, 13506-900, Rio Claro, São Paulo, Brazil aut Scatena Vera Laboratório de Anatomia Vegetal, Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho”, 13506-900, Rio Claro, São Paulo, Brazil aut Trovó Marcelo Evolution and Biodiversity of Plants, Faculty for Biology and Biotechnology, Ruhr University, 44780, Bochum, Germany aut Brittonia Springer US; http://www.springer-ny.com 65/2(2013-06-01), 262-272 0007-196X 65:2<262 2013 65 12228 https://doi.org/10.1007/s12228-012-9263-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12228-012-9263-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alves Paula Laboratório de Anatomia Vegetal, Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho”, 13506-900, Rio Claro, São Paulo, Brazil aut NATIONALLICENCE 700 1- Scatena Vera Laboratório de Anatomia Vegetal, Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista "Júlio de Mesquita Filho”, 13506-900, Rio Claro, São Paulo, Brazil aut NATIONALLICENCE 700 1- Trovó Marcelo Evolution and Biodiversity of Plants, Faculty for Biology and Biotechnology, Ruhr University, 44780, Bochum, Germany aut NATIONALLICENCE 773 0- Brittonia Springer US; http://www.springer-ny.com 65/2(2013-06-01), 262-272 0007-196X 65:2<262 2013 65 12228 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer