NOTES ON EXOBASIDIUM

The biology, taxonomy, and host relationship of Exobasidium are discussed. A key, detailed descriptions, and host records are given for Exobasidium vaccinii Wor., E. vaccinii var. arctostaphyli (Harkn.) comb, nov., E. burtii Zeller, E. decolorans Harkn., E. canadense sp. nov., E. cordilleranum sp. nov., E. cordilleranum var. minor var. nov., E. vaccinii-uliginosi Boud., E. vaccinii-uliginosi var. phyllodoces var. nov., E. dimorphosporum sp. nov., and E. empetri Ito & Otani. Evidence is presented to support the derivation of Empetrum from Ericaceae.