Postelsia 129 
amination will reveal the fact that the Pterid- 
ophyta are represented by 18 species, 12 of which 
come within the family Polypodiacee. The 
genera Polystichum, Lomaria, Pteris, and Dry- 
opteris constitute the principal part of the Pter- 
idophytic vegetation. 
The Gymnosperme are represented by 2 
families of the Conijere and present 8 genera 
and ro species. The great bulk of the Van- 
couver Island vegetation falls within this division 
and 4 or 5 species preponderate heavily: these 
are Picea sitchensis Thuja plicata, Tsuga heter- 
ophylla, Abies amabilis, and Pseudotsuga taxi- 
jolia. 
Two hundred and twenty-two species belong 
to the Angiosperme of which 79 are Mono- 
cotyledons and 143 Dicotyledons,. ‘The former 
class presents 42 genera in ro families: the latter 
I1g genera in 42 families. The characteristic 
northern preponderance of grasses, sedges, and 
rushes is shown by the fact that the family 
Graminee yields 24 species. The Cyperacee 
come second with 22 species and the Juncacee 
fifth with 9 species. The latter being exceeded 
