466 
J. C. ARTHUR 
112. PucciNiA Cenchri Diet. & Holw. (on Poaceae). 
Cenchrus echinatus L., Guatemala City, March 17, 1916, II, iii, 5^7. 
Cenchrus viridis Spreng., Quirigua, Dept. Zacapa, March 22, 191 7, 
II, 597- 
A common southern rust, for which the aecia are not known. It 
extends from the southern United States through Mexico and the 
West Indies. 
113. PucciNiA Triseti Erikss. (on Poaceae). 
Trisetum deyeuxioides (H.K.B.) Kunth, San Rafael, 7000 feet alt., 
Dept. Guatemala, Jan. 7, 1915, II, III, J5; same, Jan. 10, 1915, 
II, III, s8. 
A somewhat common rust from Colorado to Guatemala, for which 
the aecia are not known. It was collected by Kellerman on the same 
host, at Antigua, Feb. 13, 1905, II, 111,5322. 
114. PucciNiA DOCHMIA Berk. & Curt, (on Poaceae). 
Muhlenhergia ciliata (H.B.K.) Kunth, San Rafael, 6800 feet alt., 
Dept. Guatemala, Jan. 9, 1915, III,5J. 
The species ranges from central Mexico to Costa Rica. Its aecia 
are not yet known. It was collected by Kellerman near Antigua, on 
M. quitensis (H.B.K.) Hitchc, Feb. 3, 1908, 7196, 719Q. 
115. PucciNiA Jamesiana (Peck) Arth. (on Poaceae). 
Bouteloua filiformis (Fourn.) Griffiths, Chile, on railway between 
Guatemala City and Barrios, Feb. 12, 1915, III, 206. 
A heteroecious rust with aecia on various asclepiadaceous genera, 
common in the United States, but much less so southward. 
116. PucciNiA EPi I HYLLA (L.) W^ttst. (on Poaceae). 
Poa annua L., San Rafael, 7000 feet alt.. Dept. Guatemala, Jan. 8, 
1915, II, III, j^. 
It is noteworthy that this heteroecious rust, often listed as P. 
Poarum Niels., here shows telia as well as uredinia, although nowhere 
east of the Rocky Mountains in the United States, where it is common, 
are telia known. Furthermore, on this host no telia have previously 
been taken, although known from various collections ranging through 
Mexico, California, and northward to Oregon. Other hosts in the 
mountains show telia. The aecial hosts are Tussilago and Petasites, 
all the aecial species being natives of northern regions. 
