Arthur: Uredinales of Porto Rico 
187 
1903, and was labeled as on Dolichos reticulatiis.” The genus 
DoUchos, according to Engler & Prantl, Pflanzenfamilien, is 
closely related to Phaseolus and Vigna, genera which bear 
Uromyces appendtculatus, and to this species the rust was ac- 
cordingly assigned in the North American Flora, vol. 7, page 257. 
The authority, “ Hochst.” for the name of the host was supplied 
from the Kew Index. Recently, becoming suspicious of the cor- 
rectness of the name, the type material was submitted to the New 
York Botanical Garden, and it has been determined by Mr. Percy 
Wilson, March 6, 1915, as Dolicholus reticulatiis (Sw.) Millsp. 
The latter genus belongs to a different group of genera from that 
of DoUchos. The rust on the Cuban host agrees well with that 
from Texas, except that it shows only uredinia. 
Two collections of this species from South America have been 
examined, and show uredinia which agree well with the North 
American material. One was collected by M. St. Pennington, 
near San Fernanda, Argentina, 1902, on Rhynchosia Senna Gill. 
The other was issued in Spegazzini’s Dec. Myc. Arg. 20, and was 
collected by Spegazzini in 1881, at Bagnado de San Jose de 
Flores, Argentina, on “ Rhyncosia” sp. The two collections are 
given the same name, Uredo pamparum, and appear to be on the 
same host. The locality for the latter collection is the place 
where Spegazzini collected the type of Uredo pamparum, one 
year earlier. In Anal. Soc. Ci. Argent, vol. 9, page 173, this last 
species is established as on Phaseolus prostratus, a determination 
which for a variety of reasons the writer believes to have been an 
error for Rhynchosia (Dolicholus) Senna. 
A collection of the same species of rust on still another species 
of Rhynchosia, thought to be R. longeracemosa Mart. & Gall., has 
been included in Mayor’s Contribution a I’etude de Uredinees de 
Colombie, and said to agree well with the North i\merican U. 
Dolicholi, under which name it is listed. 
The several collections on Cajanus indicus show such close 
agreement in the spore and sorus characters with those on Doli- 
cholus reticulatiis, and the hosts being closely akin, there seems 
ample reason for placing them here. So far as one can judge 
from the description, Uredo Cajani Syd. (Ann. Myc. 4: 442. 
