414 GEOGRAPHICAL DISTRIBUTION OF FUNGI 



Because of the enormous financial outlay that has become 

 necessary in connection with quarantines and with the control and 

 eradication of fungi already introduced, all exotics should per- 

 force be regarded as potentially undesirable aliens and should be 

 so treated. Some fungi are closely restricted in range and are 

 very complacently provincial, some can be widely transplanted 

 without becoming obnoxious, some are exceedingly noisome when 

 transported to new environments, and some are naturally cosmo- 

 politan and international and, in consequence, have become widely 

 established. 



LITERATURE CITED 



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Arthur, J. C, et al., The plant rusts (Uredinales) . 446 pp. John Wiley 

 and Sons, New York. 1929. (See Chap. V, pp. 161-205.) 



Bisby, G. R., "The distribution of fungi as compared with that of phanero- 

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Bisby, G. R., and G. C. Ainsworth, "The numbers of fungi," Trans. Brit. 

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Bisby, G. R., A. H. R. Buller, and J. Dearness, The fungi of Manitoba. 

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Carr, L. G., "A comparison of Mycetozoa found in sandstone and limestone 

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Clayton, E. E., and J. A. Stevenson, u Peronospora tabacina Adam, the or- 

 ganism causing blue-mold (downy-mildew) disease of tobacco," Phyto- 

 pathology, 55: 101-113, 1943. 



Clinton, G. P., "Ustilaginales," North Am. Flora, 1: 1-82, 1906. 



Clinton, G. P., and F. A. McCormick, "Dutch elm disease, Graphium uhn'u' 

 Conn. Agr. Expt. Sta. Bull., 389: 707-752, 1936. 



Couch, J. N.,The genus Septobasidium. 480 pp. University of North 

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Cunningham, G. H., The rust fungi of New Zealand, together with the 

 biology, cytology, and therapeutics of the Uredinales. xx + 261 pp. 

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Diehl, W. W., "A basis for mycogeography," /. Washington Acad. Sci., 

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Faull, J. H., "Taxonomy and geographical distribution of the genus Milesia," 

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