A. Gray—WNorth American F. lora. . 335. 
tween lat. 36° and 34° rising considerably above 6,000 feet ; 
they have botanical attractions of their own, but they have no. 
alpine plants. A few subalpine species linger’ on the cool 
shores of Lake Superior, at a comparatively low level. Per- 
baps as many'are found nearly at the level of the sea on Anti- 
costi, in the Gulf of St. Lawrence, abnormally cooled by the 
abrador current. 
The chain of great fresh-water lakes, which are discharged 
by the brimming St. Lawrence, seems to have little effect upon 
our botany, beyond the bringing down of a few northwestern 
species. But you may note with interest that they harbor 
sundry maritime species, mementoes of the former saltness of 
these interior seas, Cakile Americana, much like the European 
Sea Rocket, Hudsonia tomentosa (a peculiar Cistaceous genus 
ry 
which characterizes the plains beyond our wooded region. 
- I have thought that some general considerations like these 
might have more interest for the biological section at large than 
any particular indications of our most interesting plants, and 
of how and where the botanist might find them. Those who 
In these busy days can find time to herborize will be in the 
excellent hands of the Canadian botanists. At Philadelphia 
their brethren of “the States” will be assembled to meet their 
Visitors, and the Philadelphians will escort them to their classic 
ground, the Pine Barrens of e To have an idea of 
this peculiar phytogeographical district, you may suppose a 
long wedge of the Carolina coast to be thrust up northward 
quite to New York harbor, bringing into a comparatively cool 
climate many of the interesting low-country plants of the 
South, which, at this season, you would not care to seek in 
their sultry proper home. Years ago, when Pursh and 
cleistogamous flowers at the root, the showy species of Chrys- 
psis, and many others, must still a 
