1903] Harvey, — An Excursion to Mt. Ktaadn 45 
ceus, and Osmunda Claytoniana in great profusion, were also recorded 
from here. 
Two more small ponds yet remain to be described. Between Lake 
Cowles and Davis Pond lies the third. It is about 150 ft. by 50 ft., 
with its longer axis running nearly east and west, and is very shallow, 
being nearly filled with vegetable debris accumulated from the wooded 
drainage slopes about it. Its shores are meadow-like and are fast 
encroaching on the pond proper which is itself so filled with vegeta- 
tion-islands that one may walk safely across it anywhere. The 
future of this pond is very evident. It empties into Davis Pond 
along its northwestern shore. 
This meadow-like society gave us an abundance of Lycopodium 
inundatum in its characteristic habitat and such other forms as Scir- 
pus caespitosus, Carex rigida Bigelowit, Viola blanda, Ledum latifolium, 
Pyrus arbutifolia, and Kalmia glauca. 
The last pond, a little larger than the third, is some 150 yards to 
the northeast of Davis Pond, and lies very near the edge of the shelf 
and almost in an east and west line with Lake Cowles. The outlet 
joins that of Davis Pond soon after it enters the valley proper below. 
In character this pond resembles closely Davis Pond but is less than 
. one third its size. We recorded here no additional rarities. 
Rising from and occupying the greater part of the shelf are two 
large roches moutonnées carved out by glaciation (fig. 1). The smaller 
forms the northeast shore of Davis Pond and the east shore of its 
outlet, while the larger one lies east and west extending from the out- 
let of Davis Pond to Lake Cowles. The summits, some ro to 15 
feet above the general level of the shelf, are flat-topped and present 
an unique plant society. 
Wooded at the base and up the slopes by spruce, fir, and birch, the 
flat glaciated tops present a striking contrast in a well developed 
alpestrine heath society (fig. 2). Kalmia augustifolia is the domi- 
nant species, with Cassandra calyculata and Ledum latifolium as 
secondary forms. ‘Together they give the society its characteristic 
xerophytic tone. Less important forms are Chiogenes serpyllifolia, 
Empetrum nigrum, and Vaccinium canadense all growing in the dense 
mats of Cladonia rangiferina and its less common variety alpestris. 
Around the bases of bare knobs of rock Vaccinium uliginosum is found 
densely matted. 
Spruce islands (fig. 2) of low straggling trees have pushed out into 
