@article {5498, title = {The biosystematics and evolution of the Polyalthia hypoleuca complex (Annonaceae) of Malesia I. Systematic treatment}, journal = {Journal of the Arnold ArboretumJournal of the Arnold Arboretum}, volume = {70}, year = {1989}, note = {148}, pages = {153-246}, author = {Rogstad, S. H.} } @article {5499, title = {Pollen characters of the Polyalthia hypoleuca complex (Annonaceae): their significance in establishing monophyly and candidate outgroups}, journal = {Bulletin du Mus{\'e}um d{\textquoteright}Histoire Naturelle, Series 4Bulletin du Mus{\'e}um d{\textquoteright}Histoire Naturelle, Series 4}, volume = {11}, number = {Sect. B, Adansonia}, year = {1989}, note = {148}, pages = {257-278}, author = {Rogstad, S. H. and A. Le Thomas} } @article {5364, title = {Reassignment of six Polyalthia species to the new genus Maasia (Annonaceae): molecular and morphological congruence}, journal = {Systematic BotanySystematic Botany}, volume = {33}, number = {3}, year = {2008}, note = {Mols, Johan B. Kessler, Paul J. A. Rogstad, Steven H. Saunders, Richard M. K.}, month = {Jul-Sep}, pages = {490-494}, abstract = {Recently published molecular phylogenies of the Annonaceae have confirmed the long-held hypothesis that the large paleotropical genus Polyalthia is polyphyletic. Species previously assigned to Polyalthia are now known to belong to up to six distinct, generally well-supported clades. Three members of a group of six species previously referred to as the Polyalthia hypoleuca complex form a monophyletic group (with 99\% bootstrap support) that is only distantly related to the other species of Polyalthia sampled. Putative morphological synapomorphies are assessed, and justification provided for validating a new generic name, Maasia. Six species names in the Polyalthia hypoleuca complex are accordingly transferred to Maasia: M. discolor, M. glauca, M. hypoleuca, M. multinervis, M. ovalifolia, and M. sumatrana.}, isbn = {0363-6445}, author = {Mols, J. B. and Ke{\ss}ler, P. J. A. and Rogstad, S. H. and Saunders, R. M. K.} }