54 ILLINOIS BIOLOGICAL MONOGRAPHS [522 



black, setae. They, in general, resemble those figured by Gaillard for 

 M. halansae or M. intermedia, but the agreement goes no further. There 

 is a strong superficial resemblance to M. pazschkeana, but the two are 

 readily distinguished by their very different mucronate hyphopodia. 



A specimen on Tecoma which I have not seen, labelled M. pazsch- 

 keana, in the Bronx herbarium may possibly belong here. 



Section G 



Spores 4-septate, no perithecial appendages, mycelial setae both, 

 simple and forked. 



Key to Species of Section G^ 



Capitate hyphopodia opposite M. ipomoeae No. 78 



Capitate hyphopodia not usually opposite 



Setae very long, 1000/x M. guareae No. 79 



Setae shorter 



Capitate hyphopodia very narrow, scarcely 



thicker than the stalk cell M. magnoliae No. 80 



Capitate hyphopodia thicker 



Head cell nearly globular M. bicornis No. 95 



Head cell more or less elongated 



Capitate .hyphopodia often opposite M. smilacis No. 81 

 Capitate hyphopodia alternate 

 Head cell regular M. helleri No. 82 



Head cell irregular 



Setae sometimes forked M. mangiferae No. 83 



Setae merely denticulate M. denticulata No. 84 



78. IVIeliola ipomoeae Earle (Not M. ipomoeae Kehm-) 



Muhlenbergia 1 : 10, July 1901. 

 On Ipomoea cathartica Poir. 



Las Marias, July 10, '15, 8183. Yega Baja, July 2, '15, 7729. 

 El Alto de la Bandera, July 16, '15, 8692. 

 On Ipomoea tUiacea (W.) Choisy. 



Anasco, Oct. 12, '13, 3506. Mayaguez, Oct. 31, '13, 3909. 

 On Ipomoea sps. Fig. 49. 



El Miradero, Aug. 4, '15, 9160. Dos Bocas, below Utuado, July 8, 



^M. stenotaphri which very rarely has bifid setae is to be found in section R. 



^The use of this specific name by Rehm (Ann. Myc. 12: 171, 1914) is clearly 

 invalidated by the prior use by Earle and M. ipomoeae Rehm becomes M. ipomoeae- 

 phile Rehm, in lit. 



