164 Rhodora [SEPTEMBER 
number of species must be limited, but the number of individuals 
developed in a short time may be enormous; they will be mostly plants 
of very rapid development and of short life, and mostly of quite low 
organization; some plants, common in the subarctic waters may here 
assume a sudden luxuriance (Chondrus); some may also appear on a 
different substratum (Ralfsia); some may take on a habit so distinct 
as to be considered a separate species native to lower latitudes (Chae- 
tomorpha). 
MALDEN, MASSACHUSETTS. 
A TRIP TO KILLINGLY, CONNECTICUT. 
CLARENCE Н. KNOWLTON. 
ArTER considering several other places for a one-day botanical 
excursion, Mr. L. J. Spalding and I finally decided on Killingly, 
Windham county, Conn. We were led to this by a study of the map, 
which revealed a diversified region ranging in elevation from 280 to 
875 feet above sea-level, with brooks, ponds and hills. A previous 
reconnoissance in July, 1903, had shown us that the underlying rocks 
were sandstone and quartzite. We had also noted and collected sev- 
eral interesting plants at that time. 
The day chosen (Aug. 23, 1908) was clear and cool after heavy 
rainfall, the vegetation was fresh, and walking easy. We left the cars 
at Attawaugan, and the first plant collected was Commelina communis 
L. It grew luxuriantly in the woods near Five-Mile River, on a bank 
which had been used as a dump at some time previous. ‘The delicate 
blue flowers were still open, and the plant seemed to flourish in its 
adopted home. 
The next accession grew abundantly in the millyard and by the 
roadside at Ballouville. This was Euphorbia hirsuta Wiegand, easily 
distinguishable from its nearest relative by its hairy stem, smooth 
fruit and peculiar seed. These specimens were not so nearly prostrate 
as E. maculata L. usually is. 
We now left the villages and explored a large meadow, part of which 
had been mowed. In this part grew good specimens of Parnassia 
Caroliniana Michx., just coming into flower. In the uncut portion, 
along with many common plants, were Pycnanthemum linifolium, 
