-70- 
in general, well marked. In the broader portions of the 
valley, as in ooo. 24. ?. 61 H. R. 43 W.. there is a dense 
growth of Alnua Incana. intermingled with occasional in¬ 
dividuals of tamarack. In the northwest corner of the above 
section there is a small "tamaracK swamp", forming a typical 
stage in the filling up of a peat bog. The ecological stages 
of such a bog have been well described by Transeau (25), 
Cooper (5), and others and will not be treated here. In 
sections 23 and 14, immediately east of the lake, the flood- 
plain is covered by a grassy marsh (fig. 40), with a shrubby 
zone lining the river, as already described. The flora of 
this area is very composite in character. Portions of it 
are dominated by a dense growth of blue joint ( Calamagrostls 
canadensis). The list of specios observed here includes 
the following: - Ascloplas incarnata L., Verbena hast at a L., 
Aster punlceus L., iSupatorlum purpureum L., Sclrpus Cyperlnus 
(L.) Aunth., Osmunda regalis L., Onoclea aenslbillfe L., 
Solidago aerctlna Ait•, Anemone canadensis L., Chelono glabra 
L., Aapldium Thelyptorlo (L.) Sw., Pteris aquillna L., 
Glyceria canadonsis (Hichx.) Trin., Lysimachla torrestria 
N 
(L.) BSP., Iris versicolor L. 9 Cicuta bulbifera I., Suutel - 
laria lateriflora L., Thaiictrum dasycarpum Fisch. & Lall., 
Galium asprollum Hichx., Conn strictum Ait., Impatlens bi ¬ 
flora Valt., Hum ex vertic Hiatus L., Hypericum vlrglnloum I., 
