RYDBERG: PHYTOGEOGRAPHICAL NOTES BDO 
from Alberta and Montana, all specimens referred to these and 
seen by me have turned out to belong to Picea albertiana. Picea 
Engelmannii and Abies lasiocarpa may be regarded as endemic 
Rocky Mountain species, which have emigrated into the Cascades. 
In the Northern Rockies there could be added to these Larix 
Lyallii, which has also emigrated into the northern part of the 
Cascades. In the very lowest part of the Subalpine Zone there are 
sometimes found intermixed trees of Pseudotsuga mucronata 
belonging really to the Montane Zone. It has about the same dis- 
tribution in the Rockies as the spruce and fir mentioned above, 
but is also equally common though in the Pacific province and 
extends south into the Sierra Madre of Mexico. It is hard to tell 
if its original home was in the Rockies or on the Pacific coast. 
The two species, Picea Engelmannit and Abies lasiocarpa, are 
not restricted to the Subalpine Zone, however, for both run down 
into the Montane Zone on northern slopes and along streams. 
The element of the Rocky Mountain flora, which has the same 
distribution as these, is, as stated before, not large and it contains 
no other woody plants. 
Trees 
Picea Engelmann Abies lasiocarpa 
Herbs 
Trisetum majus Arabis rupestris 
Poa reflexa “ Drummondir 
‘'  leptocoma Lithophragma bulbifera 
‘“*  Paddensis Ozomelis stauropetala 
‘“ mevadensis Leptasea austromontana 
+ “ rupicola +Sieversia ciliata : 
} Festuca saximontana Epilobium Drummondit 
Carex Engelmannit tPhlox caespitosa 
Macronema grindelifolium 
‘“  pyrenaica* 
‘<  petasata Aster apricus 
‘«  Geyeri Anaphalis subalpina 
Juncus balticus montanus Antennaria umbrinella 
Ophrys nephrophylla anaphaloides 
Arnica Parryt 
-Trollius albiflorus . _ 
Cardamine acuminata CRITE 
* Also in Europe and Asia. 
