Resumo

MOYA, María; GALUSSI, Alberto  e  CASERMEIRO, Luciano. Leaf and caulinar anatomy of Chascolytrum subaristatum (Poaceae, Pooideae, Poeae). Lilloa [online]. 2019, vol.56, n.2, pp.47-58. ISSN 0075-9481.  http://dx.doi.org/doi.org/10.30550/j.lil/2019.56.2/4.

The aim of this study was to describe the foliar and caulinar anatomy of the epidermis of Chascolytrum subaristatum (Poaceae) present in natural areas of the province of Entre Ríos. Transverse sections and epidermal slides of the middle part of leaves of sterile innovations and cross sections of stem of reproductive innovations. The observations of the epidermis showed that Chascolytrum subaristatum is of festucoid type, presenting rounded or elongated silica costal bodies with slightly wavy walls, epidermal cells that are longer than wide, with sinuous and straight anticlinical walls, ovoid stomata, oblong subsidiary cells, and hook-like trichomes. In the cross section, the anatomical leaf structure presents the pattern of C3 grasses, except for the colorless parenchyma observed in the mesophyll, which was not described for the festucoid type. External pericline walls of the epidermal cells of the adaxial and abaxial face are impregnated with lignin. Stems had a circular section, with unistratified epidermis, without hairs, thick cuticle and a subepidermal sclerenchyma ring. Closed collateral vascular bundles arranged in 3-4 concentric rings; and parenchyma or hollow pith was also observed.

Palavras-chave : Abaxial; adaxial; epidermis; leaf; mesophyll; stem.

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