REEXAMINATION OF SPECIES OF LEPTOSPHAERIA ON ASTERACEOUS HOSTS

Type and other specimens of ten nominal taxa included in Leptosphaeria and described from hosts in the Asteraceae were reexamined. The place ment of L. carduorum and L. dolioloides in Ophiobolus and Nodulosphaer ia, respectively, is confirmed. Leptosphaeria agnita var. ambigua is c ombined in L. agnita while C. agnita var. chrysanthemi is elevated to species level as L. chrysanthemicola. The placement of L. helminthospo ra, L. plurisepta, and L. tetonensis in Leptosphaeria is supported. Al l of the foregoing taxa are illustrated.