New records and range expansion for Paspalum procurrens and P. volcanense in northwestern Argentina and southeastern Bolivia

Abstract

Paspalum procurrens Quarin and P. volcanense Zuloaga, Morrone & Denham are two rare species of South Americangrasses inhabiting geographically restricted areas which are exposed to ecological degradation due to landscapetransformation and biodiversity losses. We present new records for these species, from the provinces of Jujuy, Salta,Tucumán and Catamarca (Argentina) and departments of Tarija, Chuquisaca, and Santa Cruz (Bolivia). New geographicdistribution maps and the biological relevance of these findings are discussed pinpointing the need for imperativeand assiduous botanical explorations in biodiversity hotspots sensible to the impact of human activities. Ploidylevels in these two species are studied.