New findings in Chusquea deficiens (Poaceae, Bambusoideae, Bambuseae), a rare woody bamboo from Northwestern Argentina

New findings in Chusquea deficiens (Poaceae, Bambusoideae, Bambuseae), a rare woody bamboo from Northwestern Argentina. Chusquea deficiens Parodi was first described in 1941 and it is known only from the type specimen. Since then, it has not been recollected again. New records of C. deficiens were found in previously undetermined herbarium specimens. With this new material, foliage leaf, culm leaf and culm anatomy were described and illustrated using scanning electron and light microscope. Epidermal and cross section studies were carried out with the purpose of identifying culm and leaf characters of taxonomic value. Morphological and reproductive characters of C. deficiens are illustrated in detail. Furthermore, its geographical distribution is revised and updated. An identification key to the species of Chusquea from Northwestern Argentina based on morphological and culm anatomical characters is presented.