SciELO - Scientific Electronic Library Online

vol.59 issue2Macrophytes in the upper Paraná river floodplain: checklist and comparison with other large South American wetlandsPhenotypic plasticity of Vaccinium meridionale (Ericaceae) in wild populations of mountain forests in Colombia author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista de Biología Tropical

On-line version ISSN 0034-7744Print version ISSN 0034-7744


SORIANO, Ana María; TERRAZAS, Teresa  and  DAVILA, Patricia. Ultraestructura de la epidermis foliar de Zeugites (Poaceae: Panicoideae). Rev. biol. trop [online]. 2011, vol.59, n.2, pp.557-568. ISSN 0034-7744.

Leaf epidermis ultrastructure of Zeugites (Poaceae: Panicoideae). The genus Zeugites comprises eleven species of neotropical grasses and it is principally distributed in Mexico, with some species extending to the Caribbean region, Central and South America. In this work, leaf epidermis ultrastructure of 11 species is described by the use of scanning electron microscopy. At least three specimens per species, that included herbarium and collected specimens, were used. An identification key and specific descriptions are included, in which the distinctive epidermal features are highlighted. The taxonomic valuable characters found were the following: presence or absence of prickles and macrohairs, intercostals short cells form and silica body form. Based on leaf epidermis characteristics, Zeugites species can be arranged into three groups: (1) species that lack prickles (Z. americana, Z. mexicana, Z. pringlei, Z. munroana and Z. sagittata); and lack macro hairs, with the exception of Z. pringlei; (2) species that have prickles (Z. latifolia and Z. smilacifolia); (3) species that have both, prickles and macrohairs (Z. capillaris, Z. hackelii, Z. pittieri and Z. sylvatica). The morphological features of leaf epidermis, support the relationship between the tribes Centotheceae and Paniceae. Rev. Biol. Trop. 59 (2): 557-568. Epub 2011 June 01.

Keywords : key; leaf blade; epidermis; macrohairs; Poaceae; Paniceae; prickles; ultrastructure; Zeugites.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License