- Contribution from the Department of Botany, The Pennsylvania State College, No. 43.
- Since this paper has been in press Dr. J. R. Weir has reported (Phytopath. 13: 187, 1923) P. papyracca on Chamaecyparis thyoides from Virginia, and on Thuja from Wisconsin and from Michigan, describing for it spores as here recorded. It seems quite likely that the New York specimens referred to above belong here, and possibly the substratum for the type of P. papyracca was Thuja or may be Juniperus rather than Vitis. A dead branch of juniper in particular might easily be passed up as Vitis.
- Mycologia 12: 48. 1920.
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