223 
CONFERENCE NOTES FOR NOVEMBER 
November conference of the scientific staff and registered 
Id in th ati 
erg; “ Elvela infula and Gyromitra esculenta,” 
by Dr. F. J. Seaver, 
Dr. Rydberg discussed at length the distribution of the sub- 
alpine pin and compared their distribution with that of the 
alpine plants growing at higher, as we with that of the 
The number of species in the Montane ir 
nearly 2,000, but only about one half of these are characteristic 
of that Zone. 
The plants of the Rockies may be divided into three categories: 
(1) Transcontinental species, (2) Species common to the Rockies 
and one of the other two provinces, Appalachian and Pacific, of 
North America, and (3) Endemic species. In the Alpine Zone 
the transcontinental las conrurite about 30 cent. of the 
species, in the Montane 
Zone perhaps 15 per eat in the Sibaontane will smaller, and 
in the Sonoran Zone aa ae non 
The plants common t Deedes and the eastern earn 
if the ee ones are excepted, are very few; in the 
Alpine and Subalpine ae none, in the ee Zone a but 
increasing in number in the Submontane Zone. 
e plants common to ne Rockies and the Pacific mountains 
are more numerou! They c constitute i n the Alpine Zone less 
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