238 BOTANICAL GAZETTE. [ September, 
[Discussed by Messrs. Tracy, Day, Lazenby, Campbell, 
Burrill, Barnes, Sturtevant and Riley, most of whom dis- 
agreed with the deductions of the author. | 
Systematic position of the Rhizocarpee: by Doveuas H. 
CAMPBELL. 
carried on by means of paraffin imbedding and serial sec- 
tions. The older literature was ‘cited, and much shown to be 
erroneous on account of unsuitable methods. d 
[the work was commended by Messrs. Barnes an 
Burrill. ] 
Pollen germination and pollen measurement: by ByRoN D. 
HaLstep. 
__ 1. The author, in studying the germination, sougy 
improve upon the methods, and after considerable tr 
tions. 
of 
I. The second part of the paper gave measurements 0 
various pollens, both moist and dry. 
© discussion. | gee: 
Comparison of the Flora of eastern and western Michigan « 
the latitude Of 44° 40: by W. J. Brat. f the 
€ paper describes the climate and topography ah iee 
lake shores in the locality named. The following nort on 
plants aay found on the east side of the state, and not 
é: 
. eh Carex Backii Boott. 
Karmia angustifolia L, Carex sterilis Willd. 
Ca illaris L. 
Picea alba um parviflorwm Nutt. Carex Houghtonit Torr. 
a Link. Botrychium Lunaria Swartz. 
Sparganium simplex Hudson. Botrychium simplex Hitchcock: 
