Studies on Schismatoglottideae (Araceae) of Borneo XIV:Piptospatha marginataresurrected and observations onPiptospatha, notably for the Rejang drainages

Abstract

Summary Piptospatha marginata is shown to be a morphologically and ecologically distinct species restricted to exposed shales along the Rejang drainages of central Sarawak, and not a synonym of NW Bornean, granite-obligated P. elongata, with which it has been considered conspecific. Recognition of P. marginata as distinct takes to nine the number of recognized Piptospatha species, of which seven are endemic to Borneo. An expanded description of P. marginata is presented and an updated key to the genus is provided.