@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 {4917, title = {A new species of Xylopia (Annonaceae) from Southern Venezuela}, journal = {NovonNovon}, volume = {3}, year = {1993}, note = {206}, pages = {99-101}, author = {Berry, P. E. and Johnson, D. M.} }