﻿Rydberg: Phytogeographical notes 



To these are added in the Northern Rockies: 



Calamagrostis Suksdorfii 



7. Coppices and 

 The following prefer more or 

 bushes, or on river banks among i 

 %Savastana odorata 

 Stipa Richardsonii 

 Oryzopsis exigua 



micrantha 

 Calamagrostis canadensis 

 " Langsdorfii 



Limited to one region : 

 Southern Rockies 

 Trisetum montanum 

 Panicularia Holmii 

 Melica Porteri 



Deschampsia elongata 



Sporoholiis cryptandm 

 Panicularia nervata 



pauciflorc 

 Festuca elatior 

 Elymus glaucus 



Northern Rockies 

 Deschampsia elongata 

 Panicularia elata 

 Melica suhulata 



8. Sand-draws and Sand-hills 

 A few species characteristic of the sand-hill regions of Nebraska 

 and Kansas enter the river valleys, growing on sandy river-banks, 

 draws, and in bottoms of canyons. They are: 



Sporoholus asperif alius 



" cryptandrus 



Panicum barhipulvinatu 

 Eriocoma cuspidata 

 Muhlenbergia pungens 

 Festuca octoflora 



To these are added ir 

 Bouteloua prostrata 

 Muhlenbergia Thurberi 

 " gracillima 



9. Hot Spring Formation 

 In the Northern Rockies, especially in the Yellowstone Na- 

 tional Park, there are found many hot springs. The minerals 

 held in solution in the hot water, mostly silicates, are deposited, 



the Southern Rockies: 



Munroa sguarrosa 

 Elymus ambiguus 



