226 BOTANICAL GAZETTE. [Sept., 
laboratory accessories used by the student, thus enabling him to 
get them out and put them away speedily, and to have them al- 
ways convenient while at work. The box was arranged to hold 
everything, from sandpaper to objectives. In the discussion that 
followed Prof. Pillsbury thought that holes bored in a block 
wo e less expensive for holding reagent bottles than box- 
like compartments. Dr. Farlow thought it rather dangerous to 
have reagent bottles placed so near objectives. ; 
communication from Dr. A. Gattinger was read, in which 
was described Hypericum lobocarpum, a new species from the 
mountains of Tennessee. 
W.H. Seaman, of Washington, read a paper on Marsilia quad- 
rifolia. Plants of this species had been procured from German 
by the Fish Commission and cultivated as a fish food, Proving 
to be rather injurious to fish than otherwise, an attempt was . 
made to destroy it. But the plant has spread and is likely to 
become permanently introduced. 
Dr. Beal stated that Marsilia had become a thriving plant in 
central Michigan. 
RIDAY, August 20,9 a.m. Rev. Thomas Morong had a 
few words to say concerning Marsilia. He said that it would 
take possession and drive out everything else, even witch grass. 
He had seen a small patch take possession of a pond and drive 
out every other aquatic. The first put out was twenty years ago, 
at Bantam Lake, Litchfield,Conn. “TI find it has gone along the 
shore for half a mile and has taken complete possession of the 
round.” 
Professor L. M. Underwood, in continuing the discussion, said 
that Marsilia was originally found at Bantam Lake and also at 
another widely separated locality, When first found it was in 
small quantities. He would ask Mr. Morong how he would ac- 
count for that fact. 
, Mr. Morong replied by stating that Dr. Gray had recently 
sent him a specimen of Potamogeton crispus from Arizona, and 
he would like to ask how it had skipped from the Atlantic sea- 
ard to Arizona. . 
The discussion was further continued by Professor Under- 
wood with reference to other species. : 
Professor T. J. Burrill next described sim ple and inexpensive 
demands of many workers who are unable either to purchase of 
devise such appliances. 
