Postelsia 59 
ether kinds of trees. In the portion of the val- 
ley traversed, Abzes and Pseudotsuga were less 
often met with than along the Gordon river 
watershed. Acer macrophyllum and Alnus 
oregana appear more frequently along the banks 
of this stream than along the other and occasion- 
ally trees of Populus deltoides and Salix lasiandra 
are seen. 
With distance, the windfalls characteristic of 
the lower valley, disappear, and the shrubby 
undergrowth assumes the same tone and is of 
the same composition as that which we have 
learned to know for the other valley. The 
herbaceous undergrowth, because of the general 
less dense nature of the forest, is more profuse. 
In point of species, there is not much difference 
and naturally many of these are common to both 
places. The following species form the main 
bulk of this herbaceous forest undergrowth: 
Polystichum munitum Asplenium filix fjoemina 
Lomaria s picant Dryopteris spinulosa 
Deschampsia caes pitosa Poa elata 
A grostis aleutica Carex laeviculmis 
Juncus paucica pitatus Alsine cris pa 
