@article {dum198, title = {Verwilderde Prunus virginiana L., Twijfelachtig voor Belgi{\"e}}, journal = {Dumortiera}, volume = {17}, year = {1980}, pages = {15-16}, chapter = {15}, abstract = {Suite {\`a} l{\textquoteright}{\'e}tude de mat{\'e}riel d{\textquoteright}herbier et apr{\`e}s investigation sur le terrain, l{\textquoteright}auteur met en doute l{\textquoteright}existence de Prunus virginiana L. {\`a} l{\textquoteright}{\'e}tat subspontan{\'e} en Belgique.}, author = {R D{\textquoteright}Hose} } @article {dum190, title = {Notities aangaande Juncus canadensis J.GAY ex LAHARPE}, journal = {Dumortiera}, volume = {6}, year = {1977}, month = {2/1975}, pages = {35-36}, chapter = {35}, author = {R D{\textquoteright}Hose} }