During class field work on the Lake Erie islands in summer 1974 at Stone Laboratory of The Ohio State University, I collected three species of vascular plants not included in Weishaupt’s Vascular Plants of Ohio (1971); a fourth species not in that work was found in Cincinnati by Dr. Jerry H. Carpenter. These four species, apparently representing new records for Ohio, seem to be infrequent to rare in the range of Gray’s Manual of Botany. The voucher specimens are deposited in the herbarium of The Ohio State University (OS) and in the Gray Herbarium (GH).