DISTRIBUTION OF SPHAGNUM AND CAREX 333 



Table Illustrating the Effect of the Divergence of the Land -masses 

 from the North Polar Area on the Distribution of Sphagnum and 

 Cabex. 



(The limits of the regions employed are as follows : — As Arctic and Subarctic are 

 included Scandinavia, North Russia, Siberia, Canada, Labrador, and lands north; as 

 Temperate, the rest of Europe and Mediterranean Africa, extra-tropical mainland of 

 Asia excluding Japan, North America between Canada and the subtropical region 

 next described; as subtropical North American, Georgia, Florida, the Gulf States, and 

 Mexico; as South American, the mainland only, Central America and the West 

 Indies being excluded ; as African, all except the Mediterranean province; and as 

 Australian, also New Zealand and Tasmania.) 





Regions 



Percentage of Species 

 occurring in both 

 the East and West 

 Hemispheres 



Data and Remarks 

 (The denominator of the fraction 

 equals the total number of species in 

 that region. The numerator equals 

 the number occurring in both hemi- 

 spheres) 







Sphagnum 



Carez 





Arctic 



100 



80 



S. 22 : C. 42 

 22 53 





A 



East and West 

 Hemispheres 



Subarctic 



89 



29 



52 211 





Temperate lati- 

 tudes 



59 



11 



S. 51 : C. 54 

 87 502 







South America, 

 Africa, Australia 



2 



4 



S. 3 : C. 6 

 180 175 



Africa and Australia 

 = East Hemisphere 





Arctic and Sub- 

 arctic 



90 



52 



S. 46: C.102 

 51 195 







Temperate lati- 

 tudes 



70 



24 



S. 52: C. 54 

 74 221 





B 



West 

 Hemisphere 



Subtropical North 

 America with 

 Mexico 



34 



Jl 



S. 12: C. 7 



35 62 





South American 

 mainland 



3(5) 



8(16) 



S. 3 : C. 6 

 110 79 



South America is here 

 compared as before 

 with Africa ; but if the 

 Eurasian species are 

 included, the percen- 

 tages would be in- 

 creased as indicated 

 by the figures in 

 parentheses. 





Arctic 





93 



42 

 45 





C 



Subarctic 





40 



60 

 150 





West 

 Hemisphere 



Temperate lati- 

 tudes 





24 



54 

 221 



Carex only 





Subtropical North 

 America with 

 Mexico 





11 



7 



62 







South American 

 mainland 





8(16) 



6 

 79 





Note. — The cases are very few where the species do not occur in corresponding latitudes in the 

 two hemispheres. Since some of the species occur in more than one zone, the same species may 

 figure more than once in the results for the northern hemisphere. In the southern hemisphere 

 Africa and Australia together represent the eastern hemisphere. The South American results 

 refer only to the southern hemisphere. If those held in common with Eurasia were added, the 

 percentage would be increased as shown above. 



