Nuevos registros y lectotipificaciones en Richardia (Rubiaceae) para la flora del Cono Sur de Sudamérica

Laila M. Miguel; Renata Nicora Chequin; Elsa L. Cabral; Roberto M. Salas

doi:10.14522/darwiniana.2022.101.1047

Authors

Laila M. Miguel Instituto de Botánica del Nordeste (IBONE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Sargento Cabral 2131, c.c. 209, CP 3400. Corrientes, Argentina; Facultad de Ciencias Exactas y Naturales y Agrimensura (FaCENA), Universidad Nacional del Nordeste (UNNE), Av. Libertad 5460, CP 3400. Corrientes, Argentina. https://orcid.org/0000-0002-9870-4983
Renata Nicora Chequin Instituto de Botánica del Nordeste (IBONE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Sargento Cabral 2131, c.c. 209, CP 3400. Corrientes, Argentina. https://orcid.org/0000-0001-6463-9725
Elsa L. Cabral Instituto de Botánica del Nordeste (IBONE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Sargento Cabral 2131, c.c. 209, CP 3400. Corrientes, Argentina; Facultad de Ciencias Exactas y Naturales y Agrimensura (FaCENA), Universidad Nacional del Nordeste (UNNE), Av. Libertad 5460, CP 3400. Corrientes, Argentina.
Roberto M. Salas Instituto de Botánica del Nordeste (IBONE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Nordeste (UNNE), Sargento Cabral 2131, c.c. 209, CP 3400. Corrientes, Argentina; Facultad de Ciencias Exactas y Naturales y Agrimensura (FaCENA), Universidad Nacional del Nordeste (UNNE), Av. Libertad 5460, CP 3400. Corrientes, Argentina. https://orcid.org/0000-0001-7799-9017

DOI:

https://doi.org/10.14522/darwiniana.2022.101.1047

Keywords:

Flora of Argentina, lectotypes, Richardsonia, taxonomy

Abstract

Richardia is a Neotropical genus, belonging to tribe Spermacoceae, family Rubiaceae. It comprises 16 species distributed from the southeastern United States to Argentina and Uruguay. As part of the studies of the genus for the flora of the Southern Cone of South America, and particularly as a contribution to the Argentinean flora, we present here the results of the taxonomic studies obtained in this genus. The botanical collections available in both national and foreign herbaria, digitalized collections in online databases and specific literature were reviewed. As a result, two new records are presented, Richardia pedicellata for Misiones province, and R. scabra var. chacoensis for Salta, with their respective illustrations and a distribution map. In addition, lectotypes are designated for three accepted species: R. humistrata, R. pedicellata, and R. stellaris, and for the following synonyms: Richardsonia acutifolia, R. divergens, R. emetica, R. rosea, and R. sparsa. An updated key to the Richardia species of Argentina is also presented.