106 



Mycologia 



series. I wish here to make grateful acknowledgment, both to 

 Professor Arthur and to Mrs. Patterson and her associates, for 

 their assistance to me. 



The total number of host-parasite combinations resulting from 

 these collections and previously unreported for Texas is two 

 hundred and sixty-five, including forty-eight new species and two 

 new varieties. There were also found to be eleven collections of 

 fungi apparently previously described but differing from their 

 descriptions to such an extent as to make it advisable to record 

 the points of difference. These new species and varieties, to- 

 gether with those to whose descriptions amendments have been 

 offered, are the basis for the present article. 



For convenience in reference the genera have been arranged 

 in alphabetic order, instead of following the natural grouping. 



Specimens from all type collections have been deposited in the 

 Mycological Herbarium at Washington, D. C, and duplicates 

 from such collections in the herbarium of the University of Texas ; 

 while of the collections of the second series, type duplicates have 

 been deposited both in the above herbaria and in the Mycological 

 Herbarium of the Texas Department of Agriculture. Wherever 

 the amount of material has been sufficient to warrant it, the writer 

 has also kept specimens in his private herbarium. 



Ascochyta boerhaaviae sp. nov. 



Spots dirty-brownish-gray, suborbicular, 2-4 mm. in diameter ; 

 pycnidia dark-brown, epiphyllous, globose depressed, immersed, 

 finally opening to surface through a pore, 80-120 X 70-105 ; 

 conidiophores not in evidence; conidia hyaline, guttulate, 1- 

 septate, 12-14X3-5-4/^ apparently filling pycnidia at maturity. 

 (Associated occasionally with Albugo bliti, but apparently inde- 

 pendently pathogenic.) 



On living leaves of Boerhaavia erecta L., Austin, Texas, Nov. 

 1, 191 5, B. C. Tharp. 



Cercospora acalypharum sp. nov. 



Amphigenous on gray-brown, distinctly zonate spots subcir- 

 cular in outline, 2-5 mm. in diameter, or by confluence much 

 larger in area ; epiphyllous conidiophores in fascicles of 4-10, 

 light-brown, straight, abruptly truncate, continuous or occasion- 



