Abstract
Recent generic realignments of the perennial grasses of the tribe Triticeae necessitate some new name combinations for North American species. Three new species combinations and three new subspecies combinations are made to accommodate six long-anthered and usually cross-pollinating species ofAgropyron sensu A. S. Hitchcock in the genusElytrigia sensu N. N. Tzvelev. Three new species combinations are made to accommodate three long-anthered and usually cross-pollinating species ofElymus sensu A. S. Hitchcock in the genusLeymus sensu N. N. Tzvelev. A complete listing is given of the North American species and subspecies ofElytrigia andLeymus as I perceive them.