Cleistopetalum Okada (1996: 4)

Turner, I. M., 2010, A consideration of Cleistopetalum and a new combination in Polyalthia (Annonaceae), Phytotaxa 8, pp. 41-45 : 41

Cleistopetalum Okada (1996: 4) —a recently recognised genus

The Annonaceae are a diverse family comprised of trees and lianas, most of which occur in tropical rain forests. In the Asia-Pacific region the family is represented by many genera most of which were described in the nineteenth century or earlier. Of the small number of genera described in the twentieth century, most have been reduced to synonyms of older genera in recent years (e.g. Ellipeiopsis R.E.Fr. , Guamia Merr. , Mezzettiopsis Ridl. , Oreomitra Diels ). A few are still considered good genera: Schefferomitra Diels , Woodiella Merr. (≡ Woodiellantha Rauschert ). The genus Cleistopetalum H.Okada was only described in 1996 based on two cauliflorous tree species, one from Borneo and the other from Sumatra. It has not received any critical attention since its description. In working on the Annonaceae for the Tree Flora of Sabah and Sarawak it was necessary to evaluate Cleistopetalum .