A new record of Euphorbia atoto (Euphorbiaceae) in Bangka Belitung and notes of Coptosapelta hammii (Rubiaceae) for Borneo

Abstract

Euphorbia atoto (Euphorbiaceae) and Coptosapelta hammii (Rubiaceae) have been recently collected from Belitung Islands, east of Sumatra, west Malesia. The discovery of Euphorbia atoto, combined with specimens kept in BO, is a new record for Bangka and Belitung Island, while C. hammii is considered to be an important rediscovery of a species thought to be endemic. Further examination of previously collected materials of C. hammii shows that this species has also been collected from Borneo, which means this species is no longer endemic to Belitung. Descriptions, photographs, notes on uses and a brief discussion are given.