The diploid phase of [Calyptospora columnaris] occurs on the following [N. American] species of Vaccinium -- 1. Vaccinium canadense Kalm. 2. V. corymbosum L. 3. V. myrtillus L. 4. V. pennsylvanicum Lam. 5. V. vacillans Kalm. 6. V. vitis-idaea L.
”- Faull, J.H. : (1939) A review and extension of our knowledge of Calyptospora goeppertiana Kühn©