1. Arthur, J. C.Manual of the Rusts in the United States and Canada, 1934, 390.
2. Arthur, J. C., and Holway, E. W. D.Mycologia, 1918,10, 129.
3. Chardon, C. E., Miller, J. H., and Muller, H. J. —, 1940,32, 177.
4. Butler, E. J., and Bisby, G. R.The Fungi of India, 1931,50, 55.
5. Clinton, G. P.Proc. Boston. Soc. nat. Hist, 1904,31, 329–529.