Vw Ass 
AAG ) os tructural wid Physiological Botany. 
hood on fhe one hand of Siberia aie on the other hand of 
the sea. pra Bata, ee 
_ Among the cultivated crops of this region the most re- 
markable are the potato, apple, grape-vine [and the cereal — 
grasses]. ‘Of the latter barley extends the farthest to the 
north, accompanied by the potato. In Europe generally the 
cereals vary with the geographical latitude ; barley in the a 
north, then rye [and oats], and wheat in the southern parts. — 
The apple and grape-vine, on the contrary, are more de- — 
pendent—at least at their northern limits—on direct sun- 
shine, and in consequence flourish there only in the most 
sunny localities. Special mention must be made of the 
turf-forming grasses, and the meadows which they ronan ae , 
found to the same extent in none of the neighbouring 
regions; heaths, moors, and alder-fens are also almost 
peculiar to this region. é “- 
3. Lhe Mediterranean Region. ee a 
The most important peculiarities of the climate wit 
determine the flora of this region are the rainlessness of the 
summer and the mildness of the winter. While, ae 
in the forest-region the chief development of vegetation 
takes place in the warmer portion of the year, in the countries 
which border the Mediterranean, on the contrary, We | 
grow during the spring, remain stationary during the dry ~ 
period of summer, and renew their growth under the influ- 
ence of the autumn rain. This peculiarity shows itself on. 
the mountainous border of the region, and in the neighbors 
hood of the Sahara; but 1s fully developed only on the shores _ 7 
tof fac ‘Mediterranean: The flora of sie Geran plains and e | 
mountains indicates an approximation, sometimes to that | al 
= 7, - 7 
a ge ead 
to Alpine ant Arctic forms. | Bie 
Agriculture has here this advantage ; that the : sae ¥ 
of Swe will Sg sev eral crops in one yea Wes. O 
