UREDINALES OF GUATEMALA 
469 
smooth or with a few, 1-5, short digitate projections, usually some- 
what narrowed below, slightly or not constricted at septum; wall 
dark chestnut-brown above, paler below, thin, about i slightly 
thickened at apex, 3-7 ix including projections; pedicel very short, 
tinted. 
On Brachypodium there also occur Puccinia Baryi, which has 
teliospores with smooth apices, and P. himalensis, which has coronate 
teliospores, but the coronations are more prominent and the uredinio- 
spores much larger than in the present form. 
119. Puccinia Cyperi Arth. (on Cyperaceae). 
Cyperus hermaphroditus (Jacq.) Standley, San Rafael, 7000 feet 
alt.. Dept. Guatemala, Jan. 8, 1915, II, III, 136 A. 
Cyperus sp., Quirigua, Dept. Zacapa, March 22, 1916, II, III, ^q8. 
Kyllinga odorata Vahl, Panajachel, Dept. Solola, Jan. 3, 191 7, II, 
663. 
A common heteroecious rust of North America. It is here 
considered distinct from the somewhat more common P. canaliculi, 
having aecia on Ambrosia and Xanthium. 
120. Puccinia Eleocharidis Arth. (on Cyperaceae). 
Eleocharis geniculata (L.) R. Br. 
Eleocharis sp. 
A collection was made by Kellerman on E. geniculata, at Palmar, 
Dept. Quezaltenango, Feb. 11, 1916, II, 54/9, and reported by Kern in 
Mycologia /. c. ; and on an undetermined Eleocharis, at Laguna, Lake 
Amatitlan, Feb. 5, 1905, II, 5J<55, and also at the same place, Feb. 17, 
1906, II, S399' 
The species is abundant in north temperate America, where the 
aecia occur on species of Eupatorium, but in tropical America only 
uredinia are known. 
121. Puccinia Caricis-polystachyae Diet, (on Cyperaceae). 
Carex polystachya Wahl. (C cladostachya WahL), San Rafael, Dept. 
Guatemala, Jan. 10, 1915, ii, III, 55; Solola, Dept. Guatemala, 
Jan. 27, 1915, ii, III, 124; Guatemala City, Dec. 20, 1916, 
Ii, III, 611. 
A long-cycle, heteroecious rust, whose aecia and alternate host 
are unknown. The species was originally collected in southern Mexico 
by Professor Holway (no. 3727). The Guatemalan material here 
