394 INTRODUCTION TO PLANT GEOGRAPHY [cHAP, 



i i:-'" 



Fig. 1 1 8. — 'Snow-patch' darkened by Arctic Bell-heather (Cassiope tetragoiia), 

 southern Baffin Island. 



Fig. 119. — Mixed middle-arctic heath with many light-coloured and other Lichens. 

 Bushlets of Narrow-leafed Labrador-tea {Ledum palustie agg.) are seen to the 

 right and left of the pipe, which is 15 cm. long and gi\es the scale. Northern 



Baffin Island. 



