Apr., 1922] RAINES VEGETATIVE VIGOR OF THE HOST 



disappeared, and the winter pustules were mainly in evidence. Observa- 

 tions seemed to indicate that the rust does not survive the winter in its 

 host plant but depends upon fresh infection in the spring on the plots of the 

 Massachusetts Agricultural Experiment Station. In this connection Hum- 

 phrey notes that uredosori on rye seedlings survived the early frosts and 

 seemed vigorous until the heavy frosts and snowfalls. The plots were then 

 covered with snow until spring. When they were again exposed, the dis- 

 colored spots where the pustules had been could be readily observed, and 

 examination showed mycelium to be present in the spots; but it was appar- 

 ently dead, for repeated examination of the plot failed to detect new spores 

 breaking out from any of the old spots. The fungus was not observed after 

 growth was resumed until early in June. 



Jelliffe (1889, p. 35) reports Puccinia graminis Pers. on the barberry 

 and on wheat as of frequent occurrence throughout Long Island. Clinton 

 (1903) reports the occurrence in Connecticut of P. rubigo-vera DC. (probably 

 P. dispersa Eriks. & Henn.) on rye and barley, of P. graminis Pers. on rye, 

 barley, oats, red-top, and timothy, and of P. coronata Cord, on the leaves of 

 Rhamnus cathartica, Notoholcus lanatus, and Avena saliva. The outbreaks 

 of the last, Clinton notes, are not nearly so prolonged or prominent as those 

 of P. graminis. Burnham and Latham (1914) report finding P. coronata 

 Cord, on the leaves of Rhamnus cathartica, Notoholcus lanatus, and Avena 

 sativa at Sothold, L. I. They also report the occurrence there of P. 

 graminis Pers. on Berberis vulgaris and on the leaves of various grasses, and 

 of P. triticina Eriks. on various species of Triticum. 



During the summer and fall of 1916 the writer collected the following 

 cereal and grass rusts in the so called "local-flora region," i.e., the region 

 within one hundred miles of New York. 



Puccinia dispersa Eriks. & Henn.: 



On wheat, five collections: at Lakehurst, N. J., June 6 (II) and August 23 (II, III); 

 at Yonkers, N. Y., July 16 (II); at New Brunswick, N. J., July 24 (II); at Williams- 

 bridge, N. Y., July 19 to September (II, III); at the New York Botanical Garden, 

 July 17 to October (II, III). 



On rye, eight collections: at Tom's River, N. J., June 3 (II, III); at Lakehurst, N. J., 

 June 20 (II, III); at Yonkers, N. Y., July 16 (II); at Queens, L. I., June 15 (II); 

 at New Brunswick, N. J., July 24 (II); at Williamsbridge, N. Y., July 19 (II); 

 at the New York Botanical Garden, July 17 to October; at Nyack, N. Y., July 8 

 (II). 



On barley, two collections: at Williamsbridge, N. Y., September 13 (II); at the New 

 York Botanical Garden, September 15 (II). 



On Agropyron repens, three collections: at Tom's River, N. J., July 4 (II); at Williams- 

 bridge, N. Y., July 19 (II); at the New York Botanical Garden, July 8 to October 

 (II, HI). 



These rusts correspond closely with Eriksson and Henning's Puccinia 

 dispersa (Puccinia rubigo-vera DC. pro parte). The uredo of the above- 

 listed collections is amphigenous. The number of pustules on the upper 

 surface is somewhat in excess of that on the lower surface, counts on pieces 



