196 



Arthur: Cultures of Uredineae in 1910 27 



upon his observations in the White Mountains of New Hamp- 

 shire, but at that time too little study had been given to the 

 morphological characters of the species inhabiting these two host 

 genera to permit of accurate determination of the various collec- 

 tions, and the conclusions were consequently misleading. 



The studies of Dr. F. D. Kern and the writer 51 a few years 

 since showed that the American aecia previously referred to this 

 species really belonged elsewhere, and that no genuine aecia of the 

 species had been collected in America in all probability. After 

 completing the cultures here recorded some of the resulting 

 material was sent to Professor Fraser, and with a knowledge of 

 the appearance and habit of the aecia thus acquired he was able 

 to go into the field and gather excellent specimens. 52 The reason 

 they have not been taken before by American collectors is doubt- 

 less due to their somewhat inconspicuous and evanescant char- 

 acter. 



Successful cultures reported now for the first time: 

 The following species have never before been cultivated, in Amer- 

 ica or elsewhere, so far as the writer knows. 



1. Puccinia Crandallii Pam. & Hume on Festuca con finis 

 Vasey collected by Mr. E. Bethel, at Boulder, Colo., on March 19, 

 1910, was sown April 21, on Symphoricarpos racemosus, Grindelia 

 squarrosa, Hydrophylhim capitatum and Arnica sp., with infec- 

 tion only on the first. The pycnia began to appear May 9, and 

 aecia May 26, neither in abundance. This was an unsuspected 

 result, and immediately upon detecting evidence of infection, a 

 second sowing was made upon another plant of Symphoricarpos 

 racemosus (May 10), which yielded more pronounced results. 

 Pycnia began to appear in ten days (May 20), and aecia in eleven 

 days more (May 31), both well formed and numerous. 



A second lot of this rust, on Festuca confinis Vasey, was re- 

 ceived from Professor A. O. Garrett, collected in City Creek 

 Canyon, Salt Lake City, Utah, April 10, 1910, and sown on the 

 same date as the previous sowing, May 10. Pycnia began to show 

 May 20, and aecia June 6. 



01 Bull. Torrey Club 33: 429. 430. 1906. 

 88 Cf. Mycologia 3: 69. 191 1. 



