448 RYDBERG: PHYTOGEOGRAPHICAL NOTES 
C. VARIOUS HYDROPHYTIC FORMATIONS 
These consist of bogs, brook banks, lakes, ponds, and brooks. 
In the Subalpine Zone these contain few grasses and no trees. The 
bogs may be divided into sedge bogs, willow bogs and Sphagnum 
bogs. 
1. SEDGE BOGS 
The sedge bogs resemble those of the Alpine Zone. These have 
already been described in a previous paper.* 
Common to the Southern and Northern Rockies 
Alopecurus aristulatus 
Calamagrostis Langsdorfit 
Poa reflexa 
Phleum alpinum 
Panicularia pauciflora 
hed nigricans 
gymnocrates 
disperma 
aurea 
brunnescens 
Reynoldsit 
ae 
“a 
“e 
‘é 
ae 
“bella 
“ aquatilis 
aad pauctflorus 
caespitosus 
Eee angustifolium 
gracile 
Juncus balticus montanus 
Mertensianus 
Bistorta bistortoides 
* linearifolia 
vivipara 
Alsine longifolia 
‘““ — strictiflora 
ee 
* See Bull. Torrey Club 41: 471, 472, I9I4. 
Alsine laeta 
“crassifolia 
calycantha 
Thalictrum alpinus 
Ranunculus affinis 
Ranunculus eximius 
Trollius albiflorus 
Aconitum columbianum 
Radicula alpina 
Parnassia fimbriata 
sé 
_ Micranthes arguta 
Geum rivale 
eceonguce ovatifolium 
Drummondii 
wyomingense 
Hippurus vulgaris 
Pyrola uliginosa 
Primula Parryi 
Anthopogon elegans 
Amarella scopulina 
* strictiflora 
Dasystephana Romanzovii 
Pleurogyne fontana 
Swertia scopulina 
“ congesta 
ee 
Myosotis alpestris 
Veronica americana ° 
