Notes and Brief Articles 



163 



of primary infection. The, only mode of penetration found dur- 

 ing the experimental work at Madison was through the stomata. 

 The removal of dead infected leaves before the young leaves 

 appear in the spring promises to be a successful means of control. 



" Short Cycle Uromyces of North America " is the title of an 

 illustrated paper by G. R. Bisby in the Botanical Gazette for 

 March, 1920. The characters, relationships, life history, cytol- 

 ogy, hosts, taxonomy, and bibilography of this group of rusts are 

 discussed in a rather comprehensive way. No new species are 

 described. The following conclusions are drawn : " Eleven 

 species of Uromyces possessing only telia and pycnia, or telia 

 alone, are now considered to be present in North America. 

 These are found especially in the higher and warmer portions 

 of the continent, and occur upon seven widely separated host 

 families. While these rusts form a group agreeing as to life 

 cycle and as to the i-celled character of the teliospores, it is not 

 considered that phylogenetic interrelationship is thereby shown, 

 morphological evidence indicating rather that the relationship of 

 a species of these rusts is found in other rusts (of various life 

 cycles and with 1- or 2-celled teliospores) upon the same or 

 related hosts. Indeed, as indicated under Uromyces hetero- 

 dermus, a group of hosts may bear a number of rusts of various 

 life cycles, belonging to Puccinia and Uromyces, widely dis- 

 tributed geographically, yet all showing a certain unanimity of 

 morphological characters, especially in the telial stage." 



" Dothidiaceous and Other Porto Rican Fungi," by F. L. 

 Stevens, with 2 plates and 3 figures in the text, appeared in the 

 Botanical Gazette for March, 1920. One new genus, Halstedia, 

 and the following fifteen new species were described : Uleodothis 

 Pteridis, Dothidella portoricensis, D. flava, Gatacauma Ocoteae, 

 C. palmicola, C. Gouaniae, Phaedothopsis Eupatorii, Halstedia 

 portoricensis, Dimerina monenses, Gloniella rubra, Gnignardia 

 Justiciae, G. Tetrazygiae, G. Nectandrae, Zignoella algaphila, 

 and Phyllosticta bonduc. 



