312 RYDBERG: PHYTOGEOGRAPHICAL NOTES 
Of these Eriocoma hymenoides, Juncus longistylis, Arabis re- 
trofracta, Lithophragma bulbifera, L. parviflora, Petrophytum caes- 
pitosum, Drymocallis glandulosa, Epilobium paniculatum, Arnica 
pedunculata, and A. fulgens extend as far east as South Dakota 
and Nebraska; Gilia aggregata extends to Minnesota, reappearing 
farther east on the Gaspé Peninsula; Carex Rossit and Draba lutea 
to upper Michigan; Woodsia scopulina and W. oregana are found 
on the Gaspé Peninsula. 
B. ROCKY MOUNTAIN SPECIES FOUND IN BOTH SOUTHERN AND 
NorTHERN ROCKIES, WHICH HAVE SPREAD INTO THE CAS- 
CADES, BUT ARE NOT FOUND IN SIERRA NEVADA 
a. Forest species 
Tree 
Picea Engelmannit 
Shrubs 
Sorbus scopulina Rubus melanolasius 
Herbs 
Calamagrostis luxurians Conioselinum scopulorum 
Carex Geyert 
Ophrys nephrophylla 
Razoumofskia, americana 
Razoumofskia Douglasu 
Atragene columbiana 
Ozomelis stauropetala 
Ligusticum tenuifolium 
A pocynum ambigens 
Aster Geyert 
Erigeron macranthus 
Erigeron speciosus 
Erigeron conspicuus 
b. Water and bog plants 
Salix exigua 
Poa leptocoma 
Poa interior 
Poa Olneye 
Agrostis humilis 
Agrostis 1dahoensis 
Limnorchis stricta 
Limnorchis borealis 
Limnorchis viridiflora 
Ibidium porrifolium 
Shrub 
Herbs 
Alsine obtusa 
Ranunculus alismaefolius 
Ranunculus cardiophyllust 
Trollius albiflorus 
Delphinium multiflorum 
Argentina argentea 
Dodecatheon parviflorum 
Castilleja exilis — 
Graphalium sulphurescens 
