A New Species of Guadua (Poaceae, Bambusoideae, Bambuseae) and Synopsis of the Genus in Argentina and Neighboring Regions

A new species of Guadua from the Atlantic forest in Argentina, Guadua variegata, is described and illustrated. Guadua variegate is compared to other taxa distributed in Argentina, Bolivia, Paraguay, Uruguay, and southern Brazil in a key and a table based on exomorphological characters. Additional micromorphological characters of foliage leaf blades and cauline epidermis of G. variegata are included. Lectotypes of G. paniculata and G. tessmannii are here designated.