50 
E. W. OLIVE AND H. H. WHETZEL 
III. Telia hypophyllous, aecidioid, in rounded or sometimes ir- 
regular, more or less numerous areas, 2-7 mm. in diameter; peridia 
evanescent, sometimes short cylindrical, with incised margin; telio- 
spores catenulate, globoid or more or less angular from pressure, 12-13 
by 16-18 fjL. 
On Compositae: 
Clihadium arhoreum J. D. Smith, Mexico. 
Clihadium Donnell-Smithii Coult., Guatemala. 
Clihadium erosum (Sw.) DC, Porto Rico {figs. 11, 12). 
Clihadium surinamense L. Dutch and French Guiana. 
We found this Endophyllum only on the slopes of the eastern 
mountains of Porto Rico, especially the foothills of El Yunque and 
El Duque. 
Endophyllum Stachytarphetae (Henn.) Whetzel & Olive, comb. nov. 
Aecidium Stachytarphetae P. Henn. Hedwigia Beibl. 38: 71. 1899. 
O. Pycnia probably not formed. 
III. Telia hypophyllous, aecidioid, one to few in number to each 
leaf, occurring in rounded, or somewhat irregular, rather inconspicuous, 
pulvinate areas; peridia evanescent; teliospores catenulate, globoid 
or more or less angular from pressure, 14-15 by 15-25 /x. 
On Verbenaceae: 
Stachytarpheta cayennensis (L. C. Rich.) Vahl {Valerianodes cayen- 
nensis (L. C. Rich.) Kuntze) Porto Rico, Santo Domingo, Bolivia, 
Colombia {figs. 5, 6). 
Stachytarpheta dichotoma Vahl, Brazil (E. Ule No. 2163.) 
According to Professor Arthur, this is the first time this rust has 
been reported from North America. We found it only at Rio Piedras, 
in a little valley near the Experiment Station. This, also, was the 
only locality in which we found the host. 
Endophylloides Whetzel & Olive, gen. nov. 
Cycle of development includes, so far as is known, only telia. 
Pycnia unknown, (probably not formed). 
Telia erumpent, the chains of spores adhering to form more or less 
extended, cylindrical columns, about 2-4 times as long as broad, waxy 
or horny when dry. Peridium wanting, or at least inconspicuous. 
