@article {5544, title = {Five new species of Guatteria (Annonaceae) from the Pakaraima Mountains, Guyana}, journal = {BlumeaBlumea}, volume = {50}, year = {2005}, note = {080}, pages = {563-573}, author = {Scharf, U. and P. J. M. Maas and W. Morawetz} } @article {5545, title = {Five new species of Guatteria (Annonaceae) from French Guiana, Guyana and Suriname}, journal = {BlumeaBlumea}, volume = {51}, year = {2006}, note = {080}, pages = {117-130}, author = {Scharf, U. and P. J. M. Maas and W. Morawetz} } @article {5546, title = {Guatteria richardii (Annonaceae), rediscovered along with two new species from French Guiana}, journal = {BlumeaBlumea}, volume = {51}, year = {2006}, note = {080}, pages = {541-552}, author = {Scharf, U. and P. J. M. Maas and W. Morawetz} } @article {5547, title = {An unusual new species of Guatteria (Annonaceae) from French Guiana and adjacent Brazil (Amap{\'a})}, journal = {BlumeaBlumea}, volume = {53}, year = {2008}, note = {080}, pages = {515-523}, author = {Scharf, U. and P. J. M. Maas and M. F. Pr{\'e}vost} }