422 INTRODUCTION TO PLANT GEOGRAPHY 



magellanica, which gives them a characteristic dark-brownish colour. 

 Associated are a few other flowering plants and some Liverworts, 

 and many more Mosses. The freshwater aquatic plants include 

 a \\'ater-starwort {CaUitrichc antarctica), a Buttercup {Ranunculus 

 biternatiis), and several Bryophytcs besides a greater number of Algae. 

 Vegetation-types of fresh and salt waters, and of snow and ice, 

 wherever thev may be developed, will be described in Chapters XV 

 and XVI. 



Further Consideration 



The only book devoted to truly arctic vegetation is the present author's 

 Botany of the Canadian Eastern Arctic, Part III, Vegetation and Ecology 

 (Department of Mines and Resources, Ottawa, Canada, National Museum 

 Bulletin No. 104, pp. vii -|- 304 and map, 1948), which gives illustrated 

 descriptions of the vegetation-types recognized in the vast eastern parts 

 of arctic Canada. Otherwise the above account has resulted from perusal 

 of numerous published papers as well as from personal experience in a 

 considerable proportion of the regions involved. Much the same is true 

 of the brief consideration given to high-alpine regions, concerning which 

 the appropriate parts of most of the general as well as regional works 

 cited at the end of Chapter XII may be found helpful if further details 

 are desired. As if in tribute to the enterprise of its authors, the Journal 

 of Ecology, published regularly since 191 3, is remarkably rich in well- 

 illustrated accounts of the vegetation of various arctic and alpine regions, 

 including some of the most rigorous and difficult of access. 



All truly arctic vascular plant species recognized to date, including 

 those mentioned in the above chapter, are described and illustrated in 

 the author's Circumpolar Arctic Flora (Clarendon Press, Oxford, pp. 

 xxviii+ 514, 1959). 



