192 
]\Iycologia 
31. Uromvces Hellerianus Arth. Bull. Torrey Club 31: 2. 
1904. 
Nigredo Helleriana Arth. N. Am. Flora 7 : 267. 1912. 
On Cucurbitaceae ; 
Cayaponia americana (Lam.) Cogn., Maricao, 723; Cabo 
Rojo, Dec. 27, 6459. 
Cayaponia racemosa (Sw.) Cogn., Corozal, Feb. 21, 422. 
Melothria guadalupensis (Spireng.) Cogn., without locality 
or date (1913 ?), 614-, Yauco, Oct. 3, JJJO; Rosario, 
Oct. 27, 5540 ; Utuado, Nov. 8, 4398, 4413; San Ger- 
man, Dec. 12, 5838. 
This species has not been reported outside of Porto Rico, 
except one collection from Guatemala, but was found on a 
phanerogamic specimen at the New York Botanical Garden, on 
M. guadalupensis from Buenaventura, Cuba, collected by Percy 
Wilson, Dec. 13, 1910, 9257. The type collection on C. racemosa 
was obtained by A. A. Heller, on the Ad juntas road eight miles 
from Ponce, Dec. 4, 1902. The species has been placed in the 
genus Nigredo without knowledge of pycnia or aecia, but on the 
assumption that they occur whenever favorable conditions permit 
the life cycle to be completed. 
32. Uromyces gemmatus Berk. & Curt. ; Berkeley, Jour. Linn. 
Soc. 10 : 357. 1869. 
On Convolvulaceae : 
Jacqueniontia nodiflora (Desv.) G. Don {Convolvulus 
nodiflorus Desv.), Coamo Springs, Jan. 4, O, I, III, 42, 
Feb. I, O, II, III, “y,’’ Jan. i, O, II, 128, April 6, II, 
III, 8i8c-, Desecheo, May 31, II, III, 1586] San Ger- I 
man, Dec. 8, II, III, 5763, Dec. 12, II, III, 3839-, Dec. 
18, II, III, 4121-, Guanica, Dec. 29, II, III, 6827c; 
Guayanilla, Nov. 13, II, 3928. 
The only other specimens of this exclusively West Indian rust 
known to the writer are one made by A. E. Ricksecker on St. 
Croix in 1896, listed in Millspaugh’s Flora of St. Croix (Field 
Mus. ; Bot. Ser., i: 466. 1902), as Puccinia Convolvuli, one 
made by E. W. D. Holway at Ponce, P. R., Jan., 1911, and one 
