Resumo

CARO, María; RUIZ, Ana; ANDRADA, Aldo  e  ALBORNOZ, Patricia. Vegetative and floral morphology, leaf and caulinar thorn anatomy and first chromosome counts of Adesmia cytisoides and A. inflexa (Fabaceae, Papilionoideae) from Northwestern Argentina. Lilloa [online]. 2018, vol.55, n.2, pp.17-29. ISSN 0075-9481.  http://dx.doi.org/10.30550/j.lil/2018.55.2/3.

Adesmia cytisoides and A. inflexa (Coluteoides) are endemic species, shrubby, thorny and perennial species from NOA. The aims of this work was to characterize the veg- etative and floral morphology, leaf and caulinar thorn anatomy and determine chromosome number in both species. The plant material was treated with conventional morphological, anatomical and cytogenetic techniques. The results show that these species are differentiated by the colour and size of flowers, the number of foliole per brachyblast and stomata density, but they have the following similar traits: absence of downy hairs in the segments; type of stomata; parenchyma cells that form tubes with phenols associated to the vascular bundles; eglandular and glandular trichomes; and chromosome number. Morphology and anatomy of both species show traits of adaptation to xeric environments. The cytogenetic analyzed here is the first contribution to the series. Coluteoides but remains unpublished for A. cytisoides y A. inflexa.

Palavras-chave : Adesmia; anatomy; chromosomes; leaf; morphology.

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