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Background and aims: Bonamia Thoaurs (Convolvulaceae) comprises about 70 species with a tropical and subtropical distribution. Morphological and molecular studies in Bonamia were carried out to clarify relationships in and out of the genus and throughout this work it was detected the need for re-limit the circumscription of some taxa. This paper contributes to the circumscription and lectotypification of Bonamia sericea (Griseb.) Hallier f., an endemic species from northern Argentina. M&M: Morphological analysis of Bonamia sericea, were made based on a study of specimens of herbaria, including the type-material, digital type images and other herbaria website. Results: A new synonym for B. sericea is proposed. The lectotype of B. sericea is here designated and a complete description and illustrations are presented. [ABSTRACT FROM AUTHOR]

This paper records for the first time the presence in the Argentine flora of the small tree Cynophalla polyantha (Triana & Planch.) Cornejo & Iltis (Capparaceae), which was recently found in the north of the province of Salta, close to the Bolivian border. [ABSTRACT FROM AUTHOR]