New records and a new species of Crataegus (Rosaceae) in Texas

Study of Crataegus during the last 4 years has revealed a number of interesting records. Crataegus stevensiana Sarg., previously known only from Oklahoma and Kansas, is reported from north and central Texas, and is added to the Texas flora. Crataegus dallasiana Sarg., a Texas endemic previously known only from historic collections from Dallas County, is newly reported from Ellis County. Crataegus turnerorum Enquist, sp. nov., is described and reported from 7 counties in central and west Texas.