Pennsylvania for Sessions 1901-1903. Ixxxi 
had also secured a seven-spurred type. He considered such 
flowers to be due to imperfect nutrition conditions, and 
while they may be abundant in one season, they are rare in 
others; seasons which favor the growth of root crops in 
general appear to give rise to pelorian development. 
Dr. Leffmann then gave a communication entitled “Plants 
Used in the Chemical Laboratory.” He said that chemical 
indicators or tests had wholly been secured from the vege- 
table kingdom till within recent years, when substitute pro- 
ducts drawn from the aniline or coal tar bodies largely took 
their place. He then reviewed several test substances. He 
also exhibited a set of ingeniously constructed models of 
leaves and flowers prepared with various test papers, and 
which gave beautiful contrast color reactions under acid 
and alkaline treatment. 
Mr. E. E. Wildman then gave “Notes on an Apparent 
Hybrid Oak,” the plant being found on Pocono Manor, 
Pocono, Pa. It occurred on a dry hillside at about 1,800 feet 
elevation, and was probably eight years old. It grew asso- 
ciated with others of like type, so as to suggest that there 
may have been older trees from which these had sprung. In 
Sargent’s “Silva” a similar leaf was figured, and there it 
was stated that the same supposed hybrid had been found 
in the early 70’s near Washington, D. C., and also in North- 
ern Vermont. The supposed parents were Q. alba and Q. 
Prinus, and the specimens of leaves shown were fairly inter- 
mediate. He stated that histological characters of the sup- 
posed parents were scarcely distinct enough to form a basis 
for comparison of the hybrid. 
Dr. Macfarlane exhibited a collection of seventeen vol- 
umes recently added to the Bartram Library, and also a 
copy of the rare first edition of Linnzus’ “Species Planta- 
rum,” recently secured for the University Library. He also 
exhibited from the Botanical Garden a cut and lobed variety 
of Scolopendrium vulgare brought by Mr. Goucher from 
Central Ireland, which bore abundant sporangia on the 
