102 RYDBERG: PHYTOGEOGRAPHICAL NOTES 
Rockies; only a few of these extend far enough south to reach the 
boundary of the United States. In other words, only a few of 
them reach Montana and still fewer northern Idaho. 
Salix alexensis Artemisia Richardsoniana 
Salix arbusculoides Artemisia arctica 
Salix Barrattiana *A chillea borealis 
Salix Drummondiana *Achillea multiflora 
*Tofieldia coccinea * Senecio lugens 
Micranthes foliolosa Potentilla emarginata 
Erigeron grandiflorus Amarella arctophila 
Erigeron lanatus Amarella propinqua 
Erigeron unalaschensis Mertensia Drummondu 
Antennaria alpina Castilleja pallida 
Antennaria monocephala 
Some of these arctic plants have a circumpolar distribution, as 
the following: 
Juncus biglumis Muscaria caespitosa 
Juncoides arcticum Micranthes nivalis 
Juncoides hyperboreum Cardamine bellidifolia 
Juncoides arcuatum Matirania alpina 
Androsace septentrionalis Casstope tetragona 
Saxtfraga rivularis Pedicularis lanata 
Draba nivalis Pedicularis Oederi 
Draba alpina Pedicularis flammea 
The following are Asiatic-American arctic plants extending into 
the Canadian Rockies: 
Cheirinia Pallasti Potentilla villosa 
Potentilla uniflora Campanula lasiocarpa 
SUBALPINE PLANTS 
Besides these, there are many of the subalpine plants which 
occasionally are found above timber line. If the sedges, which I 
have not yet recorded, are excepted,'the list cantains 80 such 
species, There is no need of giving the list in this connection. If 
I should discuss in a subsequent paper the subalpine region, such 
a list would there find its place. 
‘iene 
* Mostly subarctic-subalpine. 
