=GEOGKAl'HV OF 1M.AX1\S. 263 



CHAP. IV. 



OX THE DISTRIBUTION OF PLANTS UPON THF 

 EARTH. 



Linne, Stationes plantarum, in Amoen. Acad. vol. iv. 

 Giraud Soulavie, Geographic physique de regnc \egetal. 



F. Stromeyer, Historiae vcgetabilium geographicae Specimen. ; Dissertatio 



G. R, Treviranus, Biologic, b. ii. s. 44, 137. 



Humboldt et Bonpland, Essai sur la Geographic des Plantcs. 



Willdenow, im Magazin der Berlin, Gesellshaft naturforschender Freundc. 



Wahlenberg, Flora Lapponica. 



Dessen, Flora Carpathorum principalium. 



Dfissen, de Vegetatione et Climate Helvetioe septentrionalis. 



Brown's General Remarks, geographical and systematical, on the Botany 

 of Terra australis. 



Brown's Observations, systematical and geographical, on the Herbariuir 

 collected by Professor Smith in the vicinity of Congo. 



Humboldt, Prolegomena ad nova genera plantarum. 



Schouw, de sedibus plantarum originariis. 



Jahrbucher der Gewachskunde. 



Ritter's Sechs-Karten von Europa, mit erklarendcm Text. 



Titford's Sketches towards a Hortus botanicus Amcricanus. Table of cli- 

 mates and habitats of plants. 



390. 



The geography of plants makes iis acquainted with the 

 present distribution of plants upon the earth and in tlie 

 Abaters, and endeavours to refer their growth to external 

 causes. It is thus a part of tlie Phijswloirtj of Plants^ si nee 

 it investigates the laws according to which climate, tcmj^era- 

 ture, soil, elevation above the surface of the sea, and distance 

 from the equator, as also accidental external circumstances, 

 operate upon the production of plants. It is connected in some 

 measure with the History of Plants^ or with investigations 

 respecting the origin, diffusion, and gr-adu;d dislrihution oi 



