Arthur: Uredinales of Porto Rico 95 



115. Uredo Sauvagesiae Arth. 

 On Ochnaceae : 



Sauvagesia ere eta L., El Yunque, April 12, 231. 



116. Uredo Cupheae P. Henn. 

 On Lythraceae : 



Cuphea Parsonsia R. Br., Mayagiiez, March 7, 302; 

 Maricao, March 16, 23, 301 ; Anasco, March 28, 300. 



117. Uredo Operculinae sp. nov. 

 On Convolvulaceae : 



Operculina disseeta (Jacq.) House (Convolvulus dissectus 

 Jacq.), Yauco, along railroad east, March 31, 310. 



Uredinia hypophyllous, in small crowded groups on slightly dis- 

 colored spots, or scattered singly, subepidermal, bullate, opening 

 by a small rupture of the overarching epidermis, without para- 

 physes or peridium ; urediniospores globoid, or broadly obovoid, 

 14-23 by 23-29 /x; wall thin, about 1 fi, rarely a little more, finely 

 and closely echinulate, pale brownish or nearly colorless, the 

 pores not discernable. 



The unusual form of the sorus, and the pale, thin-walled spores, 

 distinguish this rust from previously described species on this 

 family of hosts. 



118. Uredo Hameliae Arth. 

 On Rubiaceae : 



Hamelia erecta Jacq., Yauco, base of hills two miles east, 

 March 31, 55-1. 



119. Uredo sabiceicola Arth. 

 On Rubiaceae : 



Sabicea aspera Aubl., Mayagiiez, March 1, 236, March 10, 

 235; Maricao, March 23, 237. 



120. Uredo proximella Arth. 

 On Cichoriaceae : 



Lactuca intybacea Jacq., Barceloneta, April 7, 134. 



121. Uredo Plucheae Syd. (U. biocellata Arth.). 

 On Carduaceae : 



Pluchea purpurascens (Sw.) DC, Mayagiiez, south along 

 railroad, March 3, May 3, i, II, 156. 



