5S 
FOURTEENTH REPORT. 
INVADING SPECIES. 
Picea mar.iana (seedlings). Populns tremuloicles. 
Picca mariana f. brevifolia. Calamagrostis canadensis. 
Larix laricina (some dead trees and Yaceinium medians. 
a few seedlings). Xemopanthes mucronata. 
Thuja Occident alis (seedlings). Betula alba papyrifera (seedlings). 
Gaylussacia baccata f. glaucocarpa. Populns gran dident at a. 
Pyrus arbuti folia at ro purpurea. Pinas strobus (few seedlings 0.4M ) . 
Ilex verticillata. Yaceinium canadense. 
Q uercus rubra (seedling). 
The Calamagrostis canadensis Association. 
On a patch of land, near the source of Maple River, burnt over in 
1908, meadow grasses have developt and at the present time form a 
patch of typical meadow, limited in area tho it is. Some dead stems of 
Chamaedaphne and some not entirely burnt tree stumps, however, indi- 
cate that the formation of the meadow is very recent. The larger part 
of the meadow was occupied by a rank growth of Calamagrostis cana- 
densis and Calamagrostis inexpansa , the former of which was by far the 
more abundant. Mixt in among the grasses and usually much dwarf t 
on account of the lack of light, were several secondary species, more 
typical of other associations, together with a few seedling trees. The 
meadow was in saturated soil, separated from Douglas Lake by a 
belt of Typha latifolia. 
List of the Species of the Calamagrostis canadensis Association: 
DOMINANT SPECIES. 
Calamagrostis canadensis. Calamagrostis inexpansa. 
China arundi nacea. 
SECONDARY SPECIES. 
Eupatorium perfoliatum. 
Scutellaria galericulata. 
H if peri cam vi rgi ni ou m . 
Oxypo l is rigi d ior. 
Fragaria virgi u ia na. 
Campanula apurinoidcs. 
Polygonum amph ibium. 
Eg si much ia terrestris. 
Lusimach ia thyrsi flora. 
Equisetu m laeviga tu m . 
Sa g it t aria latifolia. 
Typha latifolia. 
Iris versicolor. 
RELIC SPECIES. 
D ulich i u m aruiid i naceu in. 
Po tent ill a pa l ustris. 
Glycerin borealis. 
INVADING SPECIES. 
Populns tremuloidcs. 
Populns balsa in if era. 
Salix discolor. 
Era rin us nigra. 
