796 The American Naturalist. [September, 
plants are woven. It presses up close to the margin of the 
lake, and affords a pretty sure indication as to whether it is 
safe to venture upon the place or not. Other characteristic 
carices are C. pauciflora, C. teretiuscula, C. magellanica, C. limosa, 
C. exilis and C. redowskyana. Other species of Carex, as well as 
some species belonging to other genera in this order, are often 
found in the bog. 
Peltandra virginica is in the moors, but occurs as well along 
all our streams. Calla, while perhaps not exclusively a moor 
plant, occurs here more frequently than anywhere else. 
But a single species of the Liliaceæ is found, viz.: Vagnera 
trifolia. 
In distinct contrast we find this the chosen home of our 
rarest orchids. The representative species are: Habenaria ble- 
phariglottis, H. clavellata, H. dilatata, H. lewcophæa, Cypripedium 
reginæ, Pogonia ophioglossoides, P. verticillata, Arethusa bulbosa, 
Gyrostaichy romanzoffiana, Listera australis and Limodorum tuber- 
osum. 
Two willows, Salix myrtilloides and S. candida, are exclusively 
moor plants in this region. 
Sarracenia purpurea is confined to the moors, and is one of the 
most unique in appearance and habits of moor plants. | 
Drosera intermedia occurs only in the newest portions of 
the moor, while U. rotundifolia is more often in the drier por- 
tions, sometimes even growing upon rotten logs at the margi- 
Three of the Rosacex are conspicuous moor plants. Comarum 
palustre is usually upon the water’s edge, and is a pretty effect- 
ive moor builder. The other species are Geum rivale and 
Sanguisorba canadensis, both of which are in the more mature 
portions. + 
Decodon verticillatus occurs in considerable abundance 1 
most of the lake-containing swamps, but, as is well-known, 18 
not confined to them. It is also an important moor builder. 
Two species of Epilobium are confined to the moors— E. 
lineare and E. strictum. 
Proserpinaca palustris must also be included here. ce 
The Ericacee is one of the three most conspicuous orders m 
the moors. The other two are the sedges and the orchids. — S 
