Eight new taxa and two new reports of bambuseae (Poaceae: Bambusoideae) from Colombia

Morphological characters support the description of seven new species and one variety of Bambusoideae from Colombia belonging to four genera of woody bamboos: Arthrostylidium, Chusquea, Guadua, and Rhipidocladum. The new species and variety are described, illustrated, and compared with putatively related species. They are Arthrostylidium auriculatum, A. chiribiquetensis, A. punctulatum, A. virolinensis, Rhipiclocladum abregoensis, Guadua angustifolia var. nigra, Chusquea antioquensis, and C. arachniforme. A revised key to the South American species of Arthrostylidium is presented. Two genera of woody bamboos previously unknown in Colombia are documented to occur there. Otatea, thought to be restricted to Mexico and Central America, is found in northern Colombia, and Merostachys, widespread but with its diversity concentrated in southeastern Brazil, is reported from north-central Colombia.