PAPERS ON BOTANY 169 
Perisporium portoricense sp. nov. Stevens and Higley. Fig. 
1. 
Colony, dark brown, round, scattered, hypophyllous or 
epiphyllous, sometimes amphigenous, 0.5-1.0 cm. in diameter 
or by coalescence occupying the leaf. Mycelium copious, dif- 
fuse, dark, smooth, hyphae branching at nearly right angles, 
7-9 » in diameter. No hyphopodia. Perithecia numerous, 
globular, black, gregarious, carbonaceous, without appendages, 
ostiole or paraphyses, surface slightly rough, 175-270 p in 
diameter. Asci cylindrical, 8-spored, oblong, obtuse, stip- 
itate, attached basally, 37-50x92-125 ». Spores slightly 
curved, obtuse at apex, base somewhat acute, 3-septate, sep- 
arating at septa, end sections more or less conical, 8-9 » x 70- 
80xu. 
r 
Fig. 1. Perisporium portoricense. Asci and spores. 7489 (type). Drawn 
by R. Higley. 
On Calophyllum calaba, Mayaguez Mesa: 7489 (type). 
Vega Baja, 4310. 
The mycelium bears numerous curved hyphae standing up- 
right. The ascus walls are hyaline and very thick except at the 
apex where there is a slight notch on the inner surface. 
The fungus is peculiar in that sometimes it is quite strictly 
limited to upper surfaces, again to lower surfaces, while it is 
