@article {5189, title = {A new species of Hornschuchia (Annonaceae) from atlantic Brazil, with comments on the circumscription of the genus Trigynaea}, journal = {Contributions from the University of Michigan HerbariumContributions from the University of Michigan Herbarium}, volume = {19}, year = {1993}, note = {088, 192}, pages = {259-263}, author = {Johnson, D. M. and R. de Mello-Silva} } @article {5191, title = {Four new species of Polyalthia (Annonaceae) from Borneo and their relationship to Polyalthia insignis}, journal = {Contributions from the University of Michigan HerbariumContributions from the University of Michigan Herbarium}, volume = {22}, year = {1999}, note = {148}, pages = {95-104}, author = {Johnson, D. M. and N. A. Murray} } @article {4900, title = {Taxonomy of Xylopia barbata (Annonaceae) and related species from the Amazon/Orinoco Region}, journal = {Contributions from the University of Michigan HerbariumContributions from the University of Michigan Herbarium}, volume = {22}, year = {1999}, note = {206}, pages = {21-28}, author = {Bagstad, K. J. and Johnson, D. M.} }