Journal of Mycology 
VOX/CTVLE 113 — SEPTEMBER 1906 
TABLE OF CONTENTS 
Kellerman — A New Plowrightia from Guatemala. 185 
Arthur. — A New Classification of the Uredinales. .188 
Bain and Essary —A New Anthracnose of Altalfa and Red Clover.. 192 
Atkinson — Two New Species belonging to Naucoria and Stropharia 193 
Morgan — North American Species of Lepiota (continued) . 195 
Hedgcock — Some Wood Staining Fungi from Various localities in 
the United States. 204 
Kellerman — Notes from Mycological literature, XXI. 211 
Kellerman — Index to North American Mycology. 221 
Editor’s Notes .232 
A NEW PLOWRIGHTIA FROM GUATEMALA.* ./ 
W. A. KELLERMAN. 
A conspicuous disease of the American Century plant, Agave - 
arnericana, was noticed in Guatemala, C. A., the past two win¬ 
ters. The fungus attacks the living leaves at one or a few points, 
the infection then proceeding rapidly until the entire leaf may 
be involved. The clusters of the conspicuous fruiting bodies 
occupy suborbicular or oval spots which are very striking on ac¬ 
count of their size and red or yellowish-red color, later turning 
brown and finally black. 
Microscopic examiatnion reveals the presence of a coni- 
dial layer on the outer surface of the stromata, shown in Fig. 
3, Plate 90. The conidial cells as well as the hyphae of the outer 
portion of each stroma, are a bright brownish or yellowish color, 
under the microscope nearly hyaline. 
The stromata are arranged in concentric rows as shown in 
Fig. 1, the central ones rupturing the epidermis first, later others 
appearing, but the outermost incipient fruiting bodies never suc¬ 
ceed in uplifting the epiderims, though discoloring it. New spots 
of infection or rather central points of rupture by the stromata 
may be very close to older ones, and thus there is an effused area 
occupied by the fruits. Often the entire leaf, most commonly 
the upper portion, or only spots here and there, especially toward 
the apex, are involved. Both sides of the leaf show the con- 
* Contributions from the Botanical Laboratory of the Ohio State 
University. XXVI. 
Contribution to Guatemalan Mycology. II. 
