Revision of the Genus 'Olyra' and the New Segregate Genus 'Parodiolyra' (Poaceae: Bambusoideae: Olyreae)

摘要

The herbaceous bambusoid genus Olyra is revised. Four new South American species are described: Olyra amapana, O. latispicula, O. retrorsa, and O. tamanquareana. Three species of Olyra were found to differ significantly from the rest of the genus. The segregate genius Parodiolyra is established to accommodate these species, and the new combinations P. lateralis, P. luetzelburgii, and P. ramosissima are proposed. The new genus may share affinities with Raddiella and Diandrolyra rather than Olyra. Keys to the species in both genera are presented, as well as complete descriptions, field photographs, and distribution maps. Scanning electron microscope studies of the surface of the female anthecia yielded characters of taxonomic significance. These are illustrated and incorporated in the key. Two appendices account for all names that have been published in the genus Olyra.