ARTHUR AND JOHNSTON: UREDINALES OF CUBA 127 
on many species of Rynchospora throughout the eastern United 
States and the West Indies, the record for the islands being Ja- 
maica, Porto Rico, Martinique, Bermuda, and the Bahamas. 
38. UROMYCES SCLERIAE P. Henn. Hedwigia Beibl. 38: 67. 1899. 
ON CYPERACEAE: 
Scleria lithosperma (L.) Sw. 
This heteroecious species was detected in the phanerogamic 
herbarium of the N. Y. Bot. Garden, on this host, collected six 
miles from northwestern end Cayo Coco (Prov. Camagüey), Oct. 
23-24, 1909, J. A. Shafer 2729, showing both uredinia and telia. 
Previously it has been known in North America only from Porto 
Rico. The aecial form is yet to be discovered. 
39. UROMYCES COMMELINAE (Speg.) Cooke, Trans. Roy. Soc. 
Edinb. 31: 342. 1888. 
ON COMMELINACEAE: 
Commelina longicaulis Jacq., Cienfuegos (Prov. Santa 
Clara), Nov. 5, 1915, Johnston 207. 
This species is imperfectly known. Only uredinia have been 
found in the western hemisphere, but telia have been collected on 
the African coast of the Red Sea, the adjacent island of Socotra, 
and the Malabar coast of India. It is assumed, without direct 
evidence, that the species also includes pycnia and aecia in its 
life cycle, but whether it is to be considered as autoecious or heter- 
oecious is highly problematical. In America it is recorded also 
from Jamiaca, Porto Rico, St. Croix, and South America. 
The host is usually given as C. nudiflora L., a name, as reported 
at the New York Botanical Garden, belonging to a very different 
plant, not a member of the true genus Commelina. 
40. UromycEs CELOSIAE Diet. « Holw. Bot. Gaz. 31: 326. 1901. 
ON AMARANTHACEAE: 
Iresine Celosia L. (I. paniculata Poir.), Santiago de las 
Vegas, Feb. 28, 1916, II, Johnston 468. 
This is the first record for the West Indies, although known for 
Mexico and Guatemala. The species is imperfectly understood. 
Beside uredinia and telia there is a possibility that pycnia and 
aecia appear to complete the life cycle, and there is some likelihood 
of heteroecism. 
