PAPERS ON BOTANY 173 
On Miconia laevigata, Arecibo, 6804, Utuado, 6862, 6871, 
Maricao, 207 (type) 4822, Aguas Buenas, 302, Ponce, 4338, 
Yabucoa, 6705, 
This fungus forms buff-colored spots over the lower surface 
of Miconia leaves and though its internal mycelium was not 
demonstrated, there are formed distinct spots on the host, 
areas that are yellowed or bleached. In the centers of the older 
spots are seen regions of ashen-grey appearance that might 
lead one to suspect the presence of a Cercospora. Examina- 
tion, however, shows this ashen-grey region to be due to myr- 
iads of transparent perithecia containing dark ascospores. It 
is possible with a scalpel to lift from the leaf several square 
millimeters of the fungous weft, for microscopic examination. 
It proves to be made of an exceedingly loosely woven hyaline 
mycelium. 
Borinquenia gen. nov. 
Ety. from Borinquen, the ancient name of Porto Rico. Per- 
ithecium fleshy or membranous, ostiolate, reddish; asci fascicu- 
late, basal, paraphyses present; spores linear, septate, brown. 
Type of genus the following: 
Fig. 3. Borinquenia miconiae. Perithecium, ascus, paraphyses and spores, 
6871a (type). Drawn by J. MacInnes, 
Borinquenta miconiae sp. nov. Fig. 3. 
Spot none. Mycelium buff to tawny, superficial. Peri-~ 
thecia abundant, ovate, papillate, hyaline, wall pseudo-paren- 
