Abstract
Cochliobolus boutelouae on Bouteloua gracilis, New Mexico; Robillarda muhlenbergiae on Muhlenbergia filiformis, California; Phyllosticta bromivora on Bromus ciliatus, N. M.; Stagonospora mariae on Agrostis oregonensis, Washington. Variations and host range in spp. causing leaf spots on western grasses are discussed.