Stachyothyrsus tessmannii Harms 1910[1] Pachyelasma is a genus of flowering plants in the legume subfamily Caesalpinioideae.[3] It contains only one species, Pachyelasmia tessmannii, which is native to central Africa.The flowers are red and the fruits are four-angled black pods that may be up to 37 cm (15 in) in length.[2] The fruit is sometimes used by fishermen in remote areas of Cameroon and the Democratic Republic of Congo for poison fishing.[5] Some cocoa farmers in Cameroon mix the bark with other plant materials and extracts to create a natural pesticide[6]