New records of vascular plants for Ohio and Cuyahoga County, Ohio

Two hundred and thirty-six species and hybrids of vascular plants are listed as new records for Cuyahoga County, Ohio, and twenty-four of these taxa constitute new Ohio records. Three taxa are first reported for North America. Approximately 39% of the 236 taxa are native to the northeastern United States. Twenty listed species are designated by the Ohio Division of Natural Areas and Preserves as presumed extirpated, endangered, threatened, or potentially threatened, collectively. The abundance of new records is surprising and explanations are proposed.