Schow's Essay on Botanical Geography. 371 



five provinces ; (a) Provincia Cistorum, .which includes Spain and Portu- 

 gal. Although the genius Cistus is spread over the whole region, it seems, 

 however, to be most numerous in the Pyrenean Peninsula; (b) Provincia 

 Salviarum et Scabiosarum, the south of France, Italy, Sicily ; (c) Pro- 

 vincia Lahiatarum frutescentiutn, the Levantine Flora, Greece, Asia Mi- 

 nor, and the southern part of the Caucasian countries ; (dj Provincia Atlan- 

 tica, north of Africa, of which I do not know any characteristic that I 

 can give, and probably it might be included under the second province ; 

 (e) Provincia Semper vivorvm, the Canary Isles, perhaps also the Azores, 

 Madeira, and the north-west coast of Africa. Many Stmperviva, some 

 succulent Euphorbia? and Cacalice characterize particularly this province. 



IV. The Eastern Temperate part of the old Continent, namely Japan, 

 the north of China and Chinese Tartary, probably form a peculiar region ; 

 but we are too little acquainted with these districts to be able to admit it 

 with certainty, and still less are we able to mention any thing characteris- 

 tic in its Flora. Of Japan's 358 genera, 270 occur also in Europe and 

 North Africa, and about the same number in North America, so that its 

 Flora seems to occupy a middle place between those of Europe and North 

 America; the vegetation approaches nearer to the tropical than in Europe; 

 for we meet with the families of the Cycadca, Scitaminece, Mus<e, Palvue, 

 Anonacew, Sapindaceae ; in particular, the approach to the Flora of India 

 is remarkable. The families Rhamni {Frangulacew, Dl.) and Caprijolia 

 are found in a relatively considerable number, and exhibit several peculiar 

 genera ; thence, perhaps this region might deserve the name (Regnum 

 Rliamnorum et Cuprifbliorum- ) 



V. Regnum Asterum et Sulidaginum. ) The eastern parts of North 

 America, with the exception of those that belong to the first region, with- 

 out doubt comprehends two regions, for amongst 417 genera in Waller's 

 Flora of Carolina 117 are wanting in Bartons Flora of Philadelphia. The 

 northern parts of North America have truly but few genera which are 

 absent in the southern ; but this only shows, that there occurs here a simi- 

 lar relation to that which takes place between the north and south of 

 Europe. The southern region will include Florida, New Orleans, Geor- 

 gia, and Carolina ; the northern contains the other states of North Ame- 

 rica. What characterizes this region are, besides the numerous species of 

 genera Aster and Solidago, the great number of species of Oak and Fir, 

 the very few Cruciferce and Umbellatcc, Cichoriacew, and Cynarocephuke, 

 the want of the genus Erica, and a larger number of Vaccinia than in 

 Europe. 



VI. {Regnum Magnoliarum.) This, which includes the most south- 

 ern parts of North America, is separated from the preceding region by 

 the number of tropical forms which here appear, and show themselves 

 more frequently than on the similar parallel in the old ci».tincnt, (Sci- 

 taminea, Cycadece, Anonacew, Sapindaccw, Melastomew, Cacti, &c), from 



