@article {5730, title = {A new species in the tree genus Polyceratocarpus (Annonaceae) from the Udzungwa Mountains of Tanzania}, journal = {PhytoKeysPhytoKeys}, year = {In Press}, author = {Marshall, A.R. and Couvreur, T.L.P and Summers, A.L. and Deere, N.J. and Luke, Q.W.R. and Ndangalasi, H.J. and Sparrow, S. and Johnson, D.M.} } @article {5193, title = {New species of Xylopia and Uvaria (Annonaceae) from Tanzania}, journal = {NovonNovon}, volume = {9}, year = {1999}, pages = {55-60}, author = {Johnson, D.M. and Mwasumbi, L.B. and Mbago, F.M.} }