330 
Mycologia 
secure further knowledge of so rare a tropical form, I appealed 
to Mr. Percy Wilson to look at specimens in the phanerogamic 
herbarium at the N. Y. Bot. Garden. Mr. Wilson found three 
collections with an abundance of the rust. They are all three 
on C. virginica, two from Porto Rico, Arecibo, Jan. 27, 1899, 
Mr. & Mrs. A. A. Heller 557, Sabana Liana, Nov. & Dec., 1899, 
George P. Goll 164, and one from St. Thomas, Feb., 1887, 
Eggers. 
This species differs in a very marked way from the uredinia 
of Uromyces Commelinae, in having smaller and nearly colorless 
spores with thin walls, and especially in possessing a paraphysoid 
peridium opening by a central pore, similar to that described 
under Uredo concors. 
106. Uredo Aeschynomenis Arth. Bot. Gaz. 39 ; 392. 1905. 
Physopella ( ?) Aeschynomenis Arth. N. Am. Flora 7 : 104. 
1907. 
On Fabaceae; ' 
Aeschynoniene americana L., Mayaguez, Oct. 31, 3945; 
Ponce, Nov. 8, 4336; Maricao, Nov. 18, 4798; Rosario, 
Nov. 14, 4842; Utuado, Nov. 8, 43810b ; Aguada, Nov. 
22, 3074. 
The species was described from Mexican material. A collec- 
tion from Caracas, Venezuela, was subsequenlty communicated 
to the writer by W. G. Farlow. It is also reported by Mayor 
(Mem. Soc. Neuch. Sci. 5: 587. 1913) from Colombia. Mayor 
also reports the species from the same region on A. sensitiva Sw. 
The uredinia only are known. They possess a strongly de- 
veloped pseudoperidium composed of imbricated paraphyses, a 
character not consistent with typical species of Physopella. The 
species is, therefore, listed here under Uredo. 
107. Uredo concors sp. nov. 
Uredinia hypophyllous, in small groups on discolored usually 
reddish spots, mammillose, small, o. 1-0.3 ^^n. across, finally 
opening by a small central pore ; paraphyses united by their bases 
and internally imbricated to form a pseudoperidium, colorless to 
golden-brown, the free ends clavate, with moderately thick and 
