Arctic regions of Labrador, Mackenzie and Arctic shore. 347 
The tundra in summer is always wet and boggy, as the frost prevents under- 
ground drainage. Its vastness, uniformity and solitude is impressive. 
The Eastern arctic American flora differs from that of the western 
part of the continent in possessing more east American species. The western 
boundary is an artificial one, while the eastern, as previously mentioned, is a 
very natural one separated from Greenland by deep water. That portion of 
the region richest in plants is located between the Coppermine and Mackenzie 
rivers. Melville Island has a comparatively luxuriant flora, while the flora of 
the Boothian Peninsula, surrounded as- it is with glacial straits and situated in 
the midst of arctic islands, is perhaps the poorest. The flora of Banks Land 
to the northwest in considerably richer, as are those of the shores of Lancaster 
Sound, Barrow Strait and the shores of Baffın Bay to the north and east. 
Deuglasia arctica and Pleuropogon Sabinii are the only plants absolutely 
peculiar to arctic east America, while Parrya arenicola, Festuca Richardsonii 
are confined to arctic America (west and east). The following 35 plants are 
found on the arctic islands, and many of them on the west coast of Baffın 
Bay, but not in west Greenland'). 
ı. Astragalus alpinus L. | 19. Artemisia vulgaris L. 
2. Oxytropis (Aragallus) campestris | 20. Äster salsuginosus Hook. 
3: » uralensis DC. [DC. | 2ı. Chrysanthemum arcticum L. 
4. » nigrescens Fisch. 22. Crepis nana Rich. 
5. Sieversia Rossii R. Br. 23. Saussurea alpina DC. 
6. Arenaria (Merkia) physodes Fisch. 24. Senecio frigidus Less. 
7. Stellaria crassifolia Ehrh. 25. »  palustris Hook. 
8. Parrya arctica R. Br. 26. »  pulchellus DC. 
g. Caltha palustris L. 27. Solidago Virga-aurea L. 
ı0. Saxifraga hieracifolia Waldst.&Kit. | 28. Nardosmia capitata. 
I}. » virginiensis Michx. 2g. Valeriana capitata Pall. 
ı2. Androsace septentrionalis L. 30. Salix phlebophylla ÄAnder. 
13. > Chamaejasme Host. 31. Deschampsia caespitosa Beauv. 
14. Pedicularis capitata Adams: only | 32. Elymus mollis Trin. 
W.-Greenl.76—83°n.L. | 33. Glyceria fluitans R. Br. 
15. > versicolor Wahl. 34. Hierochlo& (Savastana) pauciflora 
ı6. Phlox sibirica L. R. Brown. 
17. Kalmia glauca Ait. 35. Pleuropogon Sabinei R. Br.: only 
ı8. Achillea ptarmica L. W.-Greenl. 76—78° n.L. 
The Western section of arctic America differs from that to the 
m... by its far greater number both of European and Asiatic species. The 
ı) HOOoKER, Jos. D.: Outlines of the Distribution of arctie Plants. Transactions of 
Society of London XXIII: 269 (1862), gave a list of 38 plants, of which we .. 
Arctostaphylos alpina and Castilleja fallida are now detected in western Greenland, also No, 14 
and 35 of our emendated list (in the arrangement of Warmıng, Tabellarisk Oversigt over Grönlands 
Flora 1887), which occur only in the forest north of western Greenland. (Drd.) 
