216 ERYTHEA. — 
J. GC. Arthur exhibited and described a new centrifugal 
machine for physiological investigations. 
A paper by D. T. MacDougal, on “ The Intertwining of 
Tendrils,” was read by J. C. Arthur. The plant most studied 
in this investigation was Micrampelis lobata. 
Mrs. Britton described the Jeeger Moss Herbarium recently. 
acquired by Columbia College. 
Professor Kellerman alluded to the Ohio State Forestry 
exhibit at Chicago, and stated that Ilex opaca, hitherto not 
certainly known from that State, had been found by him in 
Sim’s Creek, Lawrence County, near the Ohio River; he 
doubted the occurrence of Magnolia tripetala in the State, 
although it had been reported, and remarked that all the 
localities given for Chamcecyparis thyoides had yielded only 
Thuja occidentalis. Polypodium Polypodioides had been 
found on rocks in Scioto County. 
A. S. Hitchcock described the pollination of Cinothera 
Missouriensis: This plant was in flower in the vicinity of 
Manhattan 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 as2p.m. The calyx tube 
is narrow and about eleven centimeters long, and is as much 
as half filled with nectar. Just before 8 p. m. the flowers 
were abundantly visited by asphinxmoth (Deilephila lineata). 
An individual would support itself above the expanded flower, 
insertits proboscis, which usually measures about 45 mm., 
and push its head as far into the throat as possible. Except- 
ing 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 insect, but the latter 
is detained in the flower by its endeavor to secure more. lt 
would seem that the flower was adapted to a moth with a 
larger proboscis, but none are known to occur in the vicinity 
except the potato moth. Professor Hitchcock also described 
the pollination of Pentstemon Cobeea. 
Dr. Erwin F. Smith called attention to the fact that ® 
tumor, not due to nematodes, was becoming increasingly 
