sentences:  There is evidence from fossil pollen that the "Trochetiopsis" lineage has been on Saint Helena since the late Miocene (some 9.5 million years).The species of this genus were formerly included in the genus "Trochetia", but were separated by Marais in 1981 on the basis of geography and morphological characters.Unlike in "Trochetia", the "Trochetiopsis" flowers have only five stamens, and the sepals generally have appressed sericeous indumentum on their interior faces (although one species, "T. melanoxylon", lacks this last character).