362 
marked on the relationship of the plant to the Virginia Creeper. 
He demonstrated the differences of leaves, tendrils, inflorescences 
and canes, remarked on the differences in time of blooming, and 
maintained that they are specifically distinct. 
Prof. J. C. Arthur exhibited and described a new centrifugal 
machine for physiological investigations. 
A paper by Mr. D. T. MacDougal, on “The Intertwining of 
Tendrils,’ was read by Dr. J. C. Arthur. The plant most studied 
in this investigation was Micrampelis lobata. 
Mrs. Britton described the Jeger Moss Herbarium recently 
acquired by Columbia College. An account of this collection is 
published in the last number of the BULLETIN. 
Prof. Kellerman alluded to the Ohio State Forestry exhibit at 
Chicago, and stated that //ex opaca, hitherto not certainly known 
from that State, had been found by him on Sim’s Creek, Lawrence 
county, near the Ohio River; he doubted the occurrence of Mag- 
nolia tripetala in the State, although it had been reported, and re- 
marked that all the localities given for Chamecyparis thyoides 
had yielded only Thuja occidentalis. Polypodium polypodioides had 
been found on rocks in Scioto county. 
Prof. A. S. Hitchcock described the pollination of Gnothera 
Missouriensis. This plant was in flower in the vicinity of Manhat- 
tan, Kansas, between May 23d and June 6th. The flower opens 
in the latter part of the afternoon, but the stigmas may protrude 
from the bud as early as 2 p.m. The calyx tube is narrow and 
about 11 centimeters long, and is as much as half filled with nec- 
tar. Just before 8 p. m. the flowers were abundantly visited by 4 
sphinx-moth (Deilephila lineata). An individual would support 
itself above the expanded flower, insert its proboscis, which usually 
measures about 45 mm., and push its head as far into the throat 
as possible. Excepting ants, no other insects were observed to 
visit the flowers, and the visits of the moths ceased at dark. 
Only the uppermost portion of the nectar is obtained by the in- 
sect, but the latter is detained in the flower by its endeavor to 
secure more. It would seem that the flower was adapted to 4 
moth with a longer proboscis, but none are known to occur in the 
weer except the potato moth. Neg 
© Prof. Hitchcock also described the pollination’ of Pentstemow ae 
Cobea. ae 
