SUMMARYThe variability exhibited byDraparnaldiaboth in nature and in the laboratory makes it difficult to identify the species. The natural variability ofDraparnaldiawas amplified by the environmental conditions and the media used in this study.With the hope that chromosome studies would aid in taxonomic characterization by providing additional differentiating criteria, special attention was devoted to adapting techniques which could be used to determine chromosome numbers ofDraparnaldiaisolates. The chromosome numbers reported herein are as follows: (1)Draparnaldia glomerata,Isolate #1, isolated from Davis Falls, Montevallo, Alabama, was found to have a chromosome number of 13. (2)DraparnaldiaIsolate #2, an unidentified species obtained from Anniston, Alabama, was found to have a chromosome number of 13. (3)Draparnaldia acuta,Isolate #3 from Northwood Lake, Northport, Alabama, exhibited 26 chromosomes. (4)Draparnaldia plumosastrain 423 (Indiana Culture Collection), 418/a (Cambridge) was observed to have a chromosome number of 13.