342 THE BOTANISTS OP PHILADELPHIA. 



Eragrostis Purshii Schrader, etc. With his knowledge of 

 Bucks County plants, Dr. Fretz has underway a complete 

 revision of the " Catalogue," which will shortly be repub- 

 lished. 



He is a member of the Philadelphia Botanical Club, 

 the Pennsylvania Forestry Association and other societies. 



GEORGE REX. 



Dr. George Rex * was born at Chestnut Hill, and at the 

 time of his death was in his fiftieth year. He was a gradu- 

 ate of the University of Pennsylvania, and during his 

 earlier life was Assistant Demonstrator of Anatomy in that 

 institution. He was a member of the College of Physicians 

 and Surgeons, and other medical societies. 



Dr. Rex f became a member of the Academy of Natural 

 Sciences in January, 1881, and in December, 1881, he w;is 

 elected a member of the Microscopical Section. He served as 

 its Conservator from November 3, 1890, until his death. 



Dr. Rex was the highest authority on the Myxomycdes 

 in the United States. It was his enthusiastic study of this 

 group that first brought him to the Academy, aud his com- 

 munications on this subject formed an interesting part of 

 nearly every meeting. He was the author of a number 

 of species, which, owing to his extreme conservatism, will 

 doubtless, continue to bear his name. Many forms, 

 new to him, remained in his collection unnamed for years, 

 and were only published when lie had thoroughly con- 

 vinced himself that they were really new to science. His 



* See Ledger, February :>, is'.i'i, for obituary notice. A framed photograph of 

 Dr. Rex hangs in the herbarium room, Academy of Natural Sciences. 

 i iv. ."). Proceedings of Academy o/ .\<id/r<it Sciences, 40. 



