B. P. I.— 685. 



A PLANT-DISEASE SURVEY IN THE VICINITY 

 OF SAN ANTONIO, TEXAS. 



INTRODUCTION. 



During the summer and fall of 1909 and the winter and spring of 

 1910 a plant-disease survey was made of a portion of Texas in the 

 vicinity of San Antonio. The object of this work was to determine 

 the diseases which were prevalent with a view to a later and more 

 detailed investigation of those which are either new or imperfectly 

 known. 



The emphasis has been placed upon the diseases of plants due to 

 bacteria, fungi, or other parasites, but environmental factors have 

 not been overlooked. The field is an exceedingly fruitful one, since 

 but little has been published concerning the parasitic fungi or plant 

 diseases of this part of the country. Besides the report of Jennings 

 (34), * issued some years ago, and a short list by Cooke (9), but few 

 scattered records of Texas fungi exist. It will not be surprising, then, 

 if a detailed examination of a restricted area should show many 

 new and interesting forms. 



The work outlined in this report was carried out by the writers, 

 with headquarters at the University of Texas. Acknowledgment is 

 here made of the helpful suggestions of Mr. W. A. Orton. Mrs. 

 F. W. Patterson, and Miss E. C. Field, of the Department, have very 

 kindly assisted in working over the doubtful specimens and in the 

 determination of most species which appeared to be new, with the 

 exception of the Uredinales, which were submitted to Mr. F. D. 

 Kern, Lafayette, Ind. Several specimens were also referred to Prof. 

 C. H. Peck, Albany, N. Y. In addition, the senior writer visited 

 the herbaria at Washington and the New York Botanical Garden 

 in order to compare our material with their collections which are 

 rich in type specimens. 



Specimens have been deposited in the herbarium of the University 

 of Texas, at Austin, while duplicates, including type specimens, 



1 The serial numbers in parentheses used in this bulletin refer to the index to literature, 

 pp. 107-108. 



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