Abstract

GONZALEZ, Ana M. Indumento, nectarios extraflorales y anatomía foliar en Bignoniáceas de la Argentina. Bol. Soc. Argent. Bot. [online]. 2013, vol.48, n.2. ISSN 1851-2372.

Indument, extraforal nectaries and foliar anatomy in Bignoniaceae from Argentine. A comparative anatomical study was undertaken on the leaves of 50 Argentinean Bignoniaceae species in order to investigate anatomical variations which may be useful in species identifcation and to evaluate their signifcance in the taxonomy of the family. Leaves were analyzed on surface view and in serial sections, cross and paradermal, using optical and scanning electron microscopy. Among the features that stand out for their diagnostic value are: position and anatomical structure of the extraforal nectaries, trichome complement, number of layers of epidermis, mesophyll type and composition of leaf margin. These characteristic, alone or in combination may be useful in species identifcation. The results provide a comprehensive leaf anatomical character-set typical for the family.

Keywords : Anatomy; Bignoniaceae; Trichomes; Extraforal nectaries; Mesophyll; Paraveinal.

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