Alpine Characteristics of the Coteaa des Prairies. 63 



parius Michx. are two other grasses which show very 

 depauperate forms. 



Among the many other plants which may be mentioned 

 as showing Alpine characteristics on this crest of the prairie 

 hills are the following : 



Festuca ovina L.; Festuca nutans Willd ; Amorpha 

 canescens Niitt.; Amorpha microphylla Pnrsh.; Prunus 

 pumila L.; Teucrium canadense L.; Lithospermum angusti- 

 folium Michx.; Senecio lagens Richard; Crepis runcinata 

 Torr. & Gray; Zygadenus elegans Y\xrsh.\ Hedeoma hispida 

 Pursh.; Lepachys columnaris Torr. & Gray; Cyperus aris- 

 tatus Rottb.; Chrysopsis villosa Nutt.; Linum rigidum 

 Pursh.; Castilleia sessiliffora Pursh.; Solidago lanceolatah.-f 

 Solidago rigida L.; Aster ptarmicoides Torr. & Gray ; Aster 

 sericeus Vent.; Aster oblongifoHus Nutt.; Allium stellatum 

 Nutt.; Acerates viridiBora Ell.; Helianthus IsetiBorusP^rs.] 

 Helianthus hirsutus Raf.; Artemisia frigida Willd; Geum 

 triEorum Pursh.; Delphinium azureum Michx.; Physostegia 

 virginiana Benth.; Rudbeckia hirta L.; Oxybaphus hirsutus 

 Sweet; Scutellaria parvu la Michx.; Polygala verticillata'L.; 

 Prenanthes racemosa Michx. ; Gerardia aspera Dougl. ; 

 Vernonia fasciculata Michx.; Potentilla arguta Pursh.; 

 Galium boreale L. 



These characteristics might well be pointed out on many 

 of the Dakota hills, and they may possibly be shown to be 

 peculiar to high-growing vegetation; yet neither in Minne- 

 sota nor in Dakota have I ever seen so many plants varying 

 so widely as on the crest of the Coteau des Prairies in Min- 

 nesota. 



April, 1892. 



