ENDOPHYLLUM-LIKE RUSTS OF PORTO RICO 
49 
belief in a common ancestry and a present near relationship for these 
two^great groups. 
Endophyllum circumscriptum (Schw.) Whetzel & Olive, comb. nov. 
Aecidium circumscriptum Schw.; Berk. & Curtis, Journ. Phila. Acad. 
Nat. Sci. II. 2: 283. 1853. 
Aecidium Cissi Wint. Hedwigia 23: 168. 1884. 
O. Pycnia epiphyllous, few, subepidermal, rarely breaking through 
the epidermis, about 80-85 ix broad in section. 
III. Telia amphigenous but mainly hypophyllous, aecidioid, nu- 
merous, crowded, cup-shaped, borne in rounded, somewhat hyper- 
trophied, pulvinate areas; peridium recurved, slit into a few coarse 
segments; teliospores catenulate, more or less rounded-angular or 
irregular from pressure, 12-13 by 15-18 ijl. 
On Vitaceae: 
Cissus sicyoides L., Brazil, Costa Rica, Cuba, Dutch Guiana, 
Jamaica, Porto Rico, St. Thomas {figs. 3,4). 
Endophyllum Wedeliae (Earle) Whetzel & Olive, comb. nov. 
Aecidium Wedeliae Earle, Muhlenbergia i: 16. 1901. 
O. Pycnia probably not formed. 
III. Telia mainly hypophyllous, aecidioid, densely clustered, borne 
in light yellowish areas of somewhat irregular shape; peridia scarcely 
emergent, evanescent; teliospores catenulate, globoid or more or less 
angular from pressure, 12-13 by 16-18 ix. 
On Compositae: 
Wedelia trilohata (L.) Hitch. Porto Rico, Jamaica and other West 
Indian Islands {figs. 13, 14). 
This is perhaps the commonest of the Endophyllums growing in 
Porto Rico. As stated above, it was this very abundance that made 
us suspicious of any possible connection with Puccinia canaliculata, 
as had been suggested by Stevens. 
Endophyllum decoloratum (Schw.) Whetzel & Olive, comb. nov. 
Aecidium decoloratum Schw. Berk. & Curtis, Journ. Phila. Acad, Nat. 
Sci. II. 2: 283. 1853. 
Aecidium Clihadii Syd. Ann. Myc. i: 333. 1903. 
O. Pycnia probably not formed. 
