THE BOTANISTS OF PHILADELPHIA. 341 



upper and middle districts, and making extensive collections 

 for a future herbarium. The catalogue was published in 

 1876, and is the only one extant of its rich and varied 

 flora. 



In March, of 1868, he graduated from tlie Medical 

 Department of the University of Pennsylvania, and imme- 

 diately located at Sellersville, Pennsylvania, where he still 

 resides. Here he continued to devote much of his leisure 

 time to the exploration of the nearby trap-rock region and 

 the adjoining swamps, and also to making frecj[uent excur- 

 sions into other parts of the county, notably the lower end, in 

 the vicinity of Bristol. This latter region was found espe- 

 cially interesting from the similarity of its flora to that of the 

 swamps and barrens of South Jersey, and furnished many 

 new and rare plants. From collections made in difl'erent 

 parts of Pennsylvania, New Jersey and New York, together 

 with exchanges and purchases, he gradually acquired the 

 greater portion of the plants of the eastern and southern 

 United States, a total of about 5000 species and varieties. 



Since the publication of the Bucks County Catalogue, 

 he has added about fifty new plants, the rarest of which 

 are : Carex grisea Wahl var. rigida, Bailey — new to science 

 and probably a good species — Ranunculus abortivus L. var. 

 micranthus, Gray — new to the State Flora ; Isoetes Engelmanni 

 Braun, Lemna trisulca L., Callitriche deflexa Braun, var. 

 Austini Hegelm, Sium Carsonii Durand, Valerianella Wood- 

 siana AValf, var. patellaria, Gray, Pentstemon lavigatus 

 Solander, Crepis tedorum L., Coreopsis discoidea, Torr and 

 Gray, Bromus Kalmii, Gray, Plantago Patagonica Jacq, var. 

 aristata, Gray, Solanum rostratum Dunal, Carex torta Boott, 



