284 ON THE GEOGRAPHICAL DISTRIBUTION OF PLANTS. 



many are confined between the Mississippi and the northern 

 Andes, as different species of Pcntstemon, Eriogonum, Psora- 

 lea, Gaura, Mnothera, fyc. — the summits of these mountains 

 again present peculiar species: — the country west of this 

 chain affords others still different, and some in the more nor- 

 thern parts, which are common to eastern Siberia. 



Of maritime plants, some are peculiar to America, as Uni- 

 ola maritima, Spartina glabra, Gerardia maritima, Aster sub- 

 ulatus, A. sparsiflorus, Solidago laevigata, Uniola spicata, fyc. 

 — while others are common to the eastern and western con- 

 tinents, as Arundo arenaria, Salsola kali, Pimm maritimum, 

 Glaux maritima, Statice Limonium, tyc. 



