Pennsylvania fo7- Session iS^j-gS. 115 



and was succeeded by Dr. Kraemer, who spoke on " Galls of 

 the Oaks." Both communications were illustrated by speci- 

 mens and microscopic preparations. 



January 21. Dr. S. C. Schmucker occupied the chair. A 

 paper by Dr. Lucy L. W. Wilson, entitled " Observations on 

 the American Squaw Root {Conopholis Americana)," was read 

 in absence of the author by Dr. Macfarlane, and is herewith 

 published. 



Mr. Walmsley and Dr. Macfarlane made communications 

 on " Photo-Micrography," as an aid to botanical illustration, 

 and exhibited numerous photo-micrographs, lithograph repro- 

 ductions and half-tone plates. A photo-micrographic demon- 

 stration then followed. 



February ./. Dr. Adolph Miller in the chair. Mr. Henry 

 S. Conard read a paper on " Painter's Arboretum," founded 

 by the brothers Mitchel and Jacob Painter. The general dis- 

 position of the Arboretum and the rarer plants found in it 

 were referred to, special note being made of a large Gingko, 

 both species of Sequoia, Swamp Cypress with and without 

 knees, Cryptouieria japonica and Juniperus rcctirva. A series 

 of lantern slides illustrated the lecture. 



Mr. Roberts Le Boutillier then described a recent visit paid 

 to Kew Garden, and showed a fine set of Lantern slides pre- 

 pared from photographs taken by him. 



Professor Macfarlane described a trip made from Janu- 

 ary 21-29 by Mr. Le Boutillier and himself to Wilming- 

 ton, N. C. He contrasted the condition of the vegetation at 

 Philadelphia and Wilmington, spoke of several plants in flower 

 round the latter place, and stated that the Venus Fly Trap 

 {Dioncsa muscipula) was in excellent condition, though some- 

 what sluggish in its movements. The season had been a 

 mild one, and this probably favored the healthy growth of the 

 species. A piece of sod was exhibited measuring thirteen by 

 eleven inches, on which grew thirty-five Dionasa plants of 

 varying size and age. Bartonia verna was found in full flower 

 and subsequent study of its roots showed that these pos- 



