Arthur: Uredinales of Porto Rico 67 



On Bignoniaceae : 



Tecoma pentaphylla (L.) Juss., Afiasco, March 28, II, 

 358; Rio Piedras, April 11, II, 3J3. 

 This is the first time the rust has been found outside of a 

 limited area in Cuba. The host is also a new one for the species. 

 The urediniospores vary somewhat from the Cuban form in 

 having longer and more noticeable echinulation, and in the slight 

 development of the hygroscopic layer. 



22. Argomyces Vernoniae Arth. 

 On Carduaceae: 



Vernonia borinquensis Urban, Maricao, March 15, ii, III, 



149, March 16, ii, III, 150. 

 Vernonia sericea L. C. Rich (V. phyllostachya Gleason), 



Barceloneta, April 8, II, 157. 



23. Uromyces Eragrostidis Tracy. 

 On Poaceae : 



Eragrostis tephro smithes Schult., San German, April 1, 

 II, 446. 



24. Uromyces leptodermus Syd. 



On Poaceae: 



Lasiacis ligulata Hitch. & Chase, Maricao, March 23, II, 

 420. 



Lasiacis Swartziana Hitch., Mayagiiez, March 7, II, 595; 



Maricao, March 16, II, 426. 

 Panicum parvifolium Lam., Martin Pena, April 10, II, 



434 : 



25. Uromyces ignobilis (Syd.) Arth. 

 On Poaceae : 



Sporobolus indicus (L.) R. Br., Mayagiiez, March 3, II, 

 423, March 8, II, 422, March 13, II, 421; Naguabo, 

 April 19, II, 443. 



26. Uromyces Rhyncosporae Ellis. 



On Cyperaceae : 



Rynchospora distans (Michx.) Vahl., Martin Pena, April 

 10, ii, III, 29. 



Rynchospora setacea (Berg.) Boeck., Martin Pena, April 

 10, ii. Ill, 34. 



