92 



Mycologia 



second and fourth hosts are now reported for the first time. It 

 is evident that the rust may be found upon many species and 

 genera of ferns, and is doubtless common and widespread. 



104. Uredo paspalicola P. Henn. (U. Stevensiana Arth.). 

 On Poaceae : 



Axonopus compressus (Sw.) Beauv., Mayagiiez, March 

 8, 412. 



Bambos vulgaris Schrad., Maricao, March 15, 428, 429; 

 Mayagiiez, March 20, 427. 



Paspalum conjugatum Berg., Mayagiiez, Feb. 29, 413, 

 March 2, 410; Maricao, March 25, 417. 



Paspalum plicatulum Michx., Anasco, March 28, 419. 

 With the increase of material and more extended study given 

 this rust since publication of Uredo Stevensiana (Mycol. 7: 326. 

 191 5) it has been found that the presence or absence of para- 

 physes in the sorus is a variable character. Examined by scraped 

 mounts paraphyses often seem absent, when careful sections show 

 them to be present. Different sori possess paraphyses in vary- 

 ing number and prominence. There appear to be all gradations 

 between non-paraphysate and conspicuously paraphysate sori. 

 The two forms are consequently here united. 



The urediniospores of this form are indistinguishable from 

 those of Puccinia deformata Berk. & Curt., on Olyra latifolia, 

 but the latter are usually accompanied by teliospores. Such deli- 

 cate, colorless spores give few characters by which they can be 

 separated. It seems best to maintain Uredo paspalicola as a 

 distinct form until suitable teliospores are found to rightly show 

 its affinities. 



In the Stevens list (Mycol. 8: 21) a collection on Oplismenus 

 hirtellus was referred to the South American Uredo Olyrae P. 

 Henn. A more detailed study of the material has since shown 

 that it properly belongs under U. paspalicola. 



105. Uredo pallida Diet. & Holw. Bot. Gaz. 24: 37. 1897. 

 On Poaceae: 



Zea Mays L., Naguabo on slope of El Duque, April 19, 

 440. 



A new host for this rust, which has heretofore been known 



