Abstract

Plantago robusta is a critically endangered species endemic to Saint Helena Island, a remote British island located in the middle of the South Atlantic Ocean. Despite its already acknowledged considerable importance for biodiversity conservation, the species is notably poorly studied from a systematic point of view. In this work we typify the name P. robusta and present a complete account of the morphology of the species, including illustrations, field photographs and a complete description. Furthermore, we discuss important knowledge gaps concerning the species.