260 



DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 



Thalictrum, Delphmium, Impatiens, Frunus, Circcea, Chrysosplenium, Parnassia, 

 Bupleurum, Jlieracleum, Viburnum, Valeriana, Artemisia, Vaccinium, Bhododeiidron, 

 Fedicularis, and Salix, are all arctic genera found on the tropical mountains of Asia 

 (Nilghiri, Ceylon, Java, &c.), but not yet in the south temperate zones of Asia, and very 

 few of them in Temperate South Africa. 



There are, however, a considerable number of Scandinavian plants which are not found 

 in the Alps of Middle Europe, though foiuid in the Caucasus, Himalaya, &c. ; and con- 

 versely there are several Arctic Asiatic and American plants found in the Alps of Cen- 

 tral Em^ope, hut nowhere in Arctic Europe. In other words, certain species extend 

 from Arctic America through Central Asia and North India to Central Europe, which 

 do not extend from Arctic America westward to Arctic Em'ope; and there are cer- 

 tain other species which extend from Arctic Europe to the Caucasus and Central Asia, 

 which do neither exist on the Alps of Central Europe nor extend eastward to Arctic 

 America : thus, 



Common to Arctic 



Ranunculus nivalis. 



hyperboreus. 



TroUius Asiatlcus. 

 Cardamine bellidifolia. 

 Parrya macrocarpa. 



arctica. 



Draba alpina. 



muricella. 



hirta. 



rupestris. 



Eutrema Edwardsii. 

 Silene turgida. 

 Lychnis apetala. 

 Sagina nivalis. 

 Arenaria lateriflora. 



arctica. 



Stellaria borealis. 



■ huraifusa. 



longipes. 



crassifolia. 



Rubus arcticus. 



chamaemorus. 



Rosa blanda. 

 Saxifraga rivularis. 



nivalis. 



flagellaris. 



bronchialis. 



Ccenolophium Fischeri. 

 Conioselinum Fischeri. 

 Ligusticum Scoticum. 

 Chaerophyllum bulbosum. 



Eiirope and Temperate Asia, I 

 Cornus suecica. 

 Galium triflorum. 

 Valeriana capitata. 

 Nardosmia frigida. 



palmata. 



Chrysanthemum arcticum. 

 Pyrethrum bipinnatum. 

 Artemisia borealis. 

 Antennaria alpina. 

 Seuecio frigidus. 

 Ligularia Sibirica. 

 Aster Sibiricus. 



Tataricus. 



Mulgedium Sibiricum. 

 Campanula uniflora. 

 Cassiopeia hypnoides. 

 Cassandra calyculata. 

 Diapensia Lapponica. 

 Rhododendron Lapponicum, 

 Ledum palustre. 

 Gentiana detonsa. 

 Pleurogyne rotata. 

 Myosotis sparsiflora. 

 Eritrichium villosum. 

 Gymnandra borealis. 

 Castilleja pallida. 

 Veronica macrostemon. 

 Pedicularis Lapponica. 



hii'suta. 



Sudetica. 



Pinguicula villosa. 



'C, hut not to Alps of Mwope. 



Naurabergia thyrsiflora. 

 Primula stricta. 



Sibirica. 



Koenigia Islandica. 

 Betula alpestris. 

 Salix lanata. 



myrtilloides. 



polaris. 



Picea orientalis. 

 Larix Ledebourii. 

 Platanthera obtusata. 

 Calypso borealis. 

 Sparganium natans. 

 Calla palustris. 

 Luzula arcuata. 

 Juncus biglumis. 

 Carex glareosa. 



Norwegica. 



festiva. 



loliacea. 



fuliginosa. 



rariflora. 



livida. 



laxa. 



capillaris. 



salina. 



vulgaris. 



csespitosa. 



aquatilis. 



globuiaris. 



Blysmus rufus. 



