32 ILLINOIS BIOLOGICAL MONOGRAPHS [500 



SECTION D 



Spores 4-septate, mycelial and perithecial setae present. 



Key to Species of Section D. 



Setae broadly uncinate M. contorta No. 38 

 Setae not broadly uncinate 



Spores long and narrow, 48-51 x 7-9/x M. mayaguesianaNo. 39 

 Spores not long and narrow 



Spores apieulate M. circinans No. 40 



Spores not apieulate M. cyperi No. 41 



38. Meliola contorta sp. nov. 



Colonies amphigenous, mainly below, irregularly circular, 1-6 mm, 

 in diam., black. Mycelium forming a moderately loose network of 

 threads with branches usually opposite, 7/x in diameter. 



Capitate hyphopodia large, alternate, abundant but not crowded, 

 one to each cell and cells about 35/* long, ovoid or elliptical, head cell 

 17-10/x, apex obtuse, the basal cell about 7/x long. Mucronate hypho- 

 podia opposite, alternate or scattered, bottle-shaped, the neck nar- 

 row. Mycelial setae few, scattered, similar to the perithecial in charac- 

 ter. Perithecial setae variously curved or uncinate at the tip, several 

 from the base of each perithecium. About ISO/i, long, 10/a thick; apex 

 variously marked, slightly tapering, with numerous, sharp, lateral 

 projections, or uncinate with roughenings, or short bifid with the branches 

 cut into small, sharp teeth. 



Perithecia 140/x, slightly rough, with rounded protuberances, ostiole 

 none. Asci soon evanescent; ascospores 4-septate, brown, very slightly 

 constricted, obtuse, 34-37 x IO/a. 

 On Piper hispidum Sw. Fig. 30. 



Las Marias, July 11, 15, 8225 (type). 



This species which is my only collection of Meliola upon the host is 

 very interesting. It belongs in that section of the genus in which few 

 species are found, characterized by both mycelial and perithecial setae. 

 The setae moreover, are unique in being both uncinate and forked and 

 toothed. 



39. Meliola mayaguesiana sp. nov. 



Colonies amphigenous, mostly hypophyllous, circular, 2-8 mm. in 

 diam. Mycelium black, forming a rather close network, 7/x in diam- 

 eter, branches irregular, quite crooked, tangled. 



