ON THE BOTANY OF THE BRITISH POLAR EXPEDITION. 113 



Cardamine bellidifolia Erigcron compositus 



C. pratensis E. uniflorus 



Draba niuricella Androsace septentrionalis 



Cochlearia anglica Luzula campestris 



Hesperis Pallasii Deschampsia caespitosa 



Braya alpina Trisetum subspicatum 



Arenaria groenlandica Colpodiuin latifolium 



Arnica montana Equisetum variegatum 



To the southerly migration of many species now existing in 

 Discovery Bay and its vicinity, the long cliff-bound barren coast 

 from Cape Louis Napoleon, lat. 79° 45', to Cape Baird, lat. 81° 35', is 

 no doubt an insuperable obstacle. The distinction between these two 

 floras is very remarkable: thus Ellesmere Land yielded 61 species; 

 and out of a total of 80 species gathered upon the west shore 

 north of lat. 78° 45', only 55 are common to both sides of Hayes 

 Sound. 



Greenland north of 78°, i. e. 9 that part of Greenland which lies 

 opposite to Grinnell Land and Ellesmere Land, from Smith Sound 

 northward, contains altogether 50 species ; of these, the following 

 24 were not met with north of Foulke Fiord : — 



Ranunculus sulphureus S. flagellaris 



Cardamine bellidifolia S. tricuspidata ^ 



Hesperis Pallasii Vaccinium uliginosum 



Lychnis apetala Cassiopeia tetragona 



Arenaria rubella Pedicularis capitata 



SteUaria humifusa P. lapponica ^ 



S. longipes Empetrum nigrum 



Potentilla anscrina Luzula arcuata 



Epilobium latifolium Carex rigida 



Saxifraga cernua Eriophorum capitatum 



S. rivularis E. vaginatum 



S. nivalis Poa pratensis 



This list of absentees shows the extreme poverty of the flora 

 of Polaris Bay. 



Thus thirty more species (or more than half as many more) 

 were gathered upon the west side of Smith Sound and Kobeson 

 Channel than upon the east, north of lat. 78° ; further examination 

 would perhaps reduce this difference slightly, but only slightly, 

 since Polaris Bay has been thoroughly explored. Also, two or 

 three plants are recorded by Elias Durand from Washington Land, 

 north of the Great Glacier, in his account of Kane's plants, but 

 several plants there entered are open to grave suspicion. SteUaria 

 humifusa and Poa jwatensis are the only two plants which occurred 

 on the east, but not on the west shore north of lat. 78°, which make 

 the total for these latitudes to be eighty-two species. 



Though the Humboldt Glacier, w : ith its sea-wall of blue ice 

 seventy miles long and a hundred feet above the water's edge, 

 intervenes for a latitude of upwards of one degree on the east side 

 of Smith Sound, its effects with regard to the range of Greenland 

 plants would appear far less than those of Hayes Sound and the 



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