406 



BOTANICAL GAZETTE 



[DECEMBER 



FIG. I. Map showing distribution of bog plants, (i) Drosera, Dulichium. (2) 

 Sarracenia, Drosera, Dulichium, Eriophorum, Chiogenes, Chamaedaphne. (3) 

 Dulichium, Menyanthes. (4) Drosera, Comarum, Menyanthes, Eriophorum, Ledum, 

 Andromeda. (5) Drosera, Comarum, Menyanthes, Eriophorum, Oxycoccus, Andromeda, 

 Ledum, Kalmia, Chamaedaphne. (6) Menyanthes, Oxycoccus, Ledum, Andromeda, 

 Kalmia. The presence of a large number of shrubs in Alaska and Greenland is 

 probably connected with their preservation there during glacial times. 



