A New Jacquemontia (Convolvulaceae) Species from the Brazilian Atlantic Forest

Abstract

Abstract— A new species from the Atlantic Forest of northeastern Brazil, Jacquemontia atlantica, is described and illustrated. A distribution map, karyological characters, and an identification key for the species of that genus found in the Atlantic Forest are also provided, and its informal conservation status is assessed according to IUCN criteria. Its relationships with Jacquemontia glaucescens and other morphologically close species are discussed.

A new Jacquemontia Choisy (Convolvulaceae) species from the Brazilian Amazon forest

“…Jacquemontia Choisy is one of the most diverse genera of Convolvulaceae Juss., comprising approximately 120 species (Staples and Brummit 2007;. It is morphologically characterized by having a climbing or shrubby habit, simple leaves, stellate or glandular trichomes, blue or white corolla, single style with two oval, flattened, or filiform stigmatic lobes, pantocolpate pollen with three to 15 colpi, and capsules with eight valves (Meisner 1869;Nepomuceno et al 2022;Belo et al 2023a). More than 60 species are currently known to Brazil, of which 41 are endemic (Pastore et al 2023).…”

“…Numerous floristic and taxonomic studies and descriptions of new Jacquemontia species have been published in the last decade, contributing to our knowledge of the genus in South America (Krapovickas 2009;Buril and Alves 2011, 2012a, 2012bBuril et al 2012;Simão-Bianchini 2015, 2016;Nepomuceno et al 2022). Various studies focusing on the diversity of Convolvulaceae have been undertaken in the Amazon region, either in terms of describing new taxa or floristic surveys (Falcão 1971;Austin 1981;Simão-Bianchini et al 2016).…”