title: Three new caespitose species of Senecio (Asteraceae, Senecioneae) from South Peru.
abstract: Three new species of the genus Senecio (Asteraceae, Senecioneae) belonging to Senecio ser. Suffruticosi subser. Caespitosi were discovered in the tributaries of the upper Tambo River, Moquegua Department, South Peru. Descriptions, diagnoses and discussions about their distribution, a table with the morphological similarities with other species of Senecio, a distribution map, conservation status assessments, and a key to the caespitose Peruvian species of Senecio subser. Caespitosi are provided. The new species are Senecio moqueguensis Montesinos, sp. nov. (Critically Endangered) which most closely resembles Senecio pucapampaensis Beltrán, Senecio sykorae Montesinos, sp. nov. (Critically Endangered) which most closely resembles Senecio gamolepis Cabrera, and Senecio tassaensis Montesinos, sp. nov. (Critically Endangered) which most closely resembles Senecio moqueguensis Montesinos.
authors.affiliation: Nature Conservation & Plant Ecology Group, Wageningen University, Netherlands. Droevendaalsesteeg 3a, 6708PB Wageningen, The Netherlands ; Naturalis Biodiversity Centre, Botany Section, N ; ational Herbarium of The Netherlands, Herbarium Vadense. Darwinweg 2, 2333 CR Leiden, The Netherlands.
authors.forename: Daniel B Montesinos
authors.initials: DB
authors.lastname: Tubée
keywords: Compositae; Senecio subser. Caespitosi; South America; new species; taxonomy