346 THE BOTANISTS OF PHILADELPHIA. 



WILLIAM CLARK STEVENSON. 



William Clark Stevenson, Jr., was born December 7, 

 1848, at Philadelphia. He attended the public schools, 

 Rugby Academy and Polytechnic College of Pennsylvania. 

 From 1870 to 1880, Mr. Stevenson was in the wholesale 

 drug business, and in the paper box trade (Novelty Paper 

 Box Company) from 1881 to 1894. 



Mr. Stevenson is more especially interested in mycol- 

 ogy, and has a mycological herbarium of some 5500 

 species, mostly of his own collecting, from Philadelphia, 

 Chester and Delaware Counties, Pennsylvania. 



A paper entitled "Additions to Mr. Cooke's Paper on 

 the Valsei of the United States " appeared in the Proceedings 

 of the Academy of Natural Sciences, April, 1878, pp. 86-88, 

 and was the result of an examination of the Schweinitzian 

 types in the Academy herbarium. He has been a life-long 

 friend of Mr. J. B. Ellis. He has prepared a, manuscript 

 card catalogue of references, mostly American, bearing 

 upon mycology. His habitat list, and list of plant diseases 

 due to fungi, is very complete and full, and deserves publica- 

 tion by some learned society. The host plants are very care- 

 fully catalogued, as also the parasites which prey upon them. 



Mr. Stevenson is a member of the Academy of Natural 

 Sciences, the Photographic Society of Philadelphia and 

 Societe Beige de Microscopic, of Brussels, Belgium. 



ROBERT G. BECHDOLT. 



Robert G. Bechdolt, son of William L. and Lizetta 

 Bechdolt, was born December 26, 1848, at Knealingen, 

 Baden, Germany, and four years afterwards came, with the 

 rest of the family, to the United States, locating at Easton, 

 Northampton County, Pennsylvania, where he attended the 



