title: Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru.
abstract: A synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae) is presented, including the description of a new species, Plazia robinsonii M.O.Dillon & Sagást., from a locality c. 20 kms west of Huamachuco, Department of La Libertad in northern Peru. It most closely resembles Plazia conferta Ruiz & Pav., a narrow endemic from central Peru some 450 km to the south; however, the latter species has larger leaves and smaller capitula. Plazia is a small genus of four species confined to the Andean Cordillera of Peru, Bolivia, Chile, and Argentina. A distribution map of the four species, an illustration of the new species, a photograph of the holotype, and a key to species are provided.
authors.affiliation: Botany Department, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL 60605, USA.
authors.forename: Michael O
authors.initials: MO
authors.lastname: Dillon
authors.affiliation: Freie Universität Berlin, Institut für Biologie - Botanik, Altensteinstr. 6, D - 14195, Berlin, Germany and Departamento de Silvicultura y Conservación de la Naturaleza, Universidad de Chile, Santiago, Chile ; Present address: Universität Bonn, Nees - Institut für Biodiversität der Pflanzen, Meckenheimer Allee 170, D - 53115 Bonn, Germany.
authors.forename: Federico
authors.initials: F
authors.lastname: Luebert
keywords: Asteraceae; Department of La Libertad; Mutisioideae; Onoserideae; Plazia; endemics; flora of Peru; new species