334 GEOGRAPHICAL BOTANY. 



produced, and by which Steenstrup's succession of forest 

 growth in maritime countries would be brought into 

 connexion with the extermination of the Coniferse in the 

 elevated regions of the upper Hartz mountains. 



The work of Fuchs, on the Venetian Alps, contains 

 an account of the limits of vegetation in the southern 

 dolomitic Alps, especially the district of Agordo ; it fills 

 up an important gap in the observations upon the ver- 

 tical distribution of the Alpine plants (Vienna, 1844, fol.) 

 Unfortunately, however, in the case of most of the plants, 

 the lower limits of altitude only are given ; and of these, 

 a local value only can be attributed to many measure- 

 ments. The results, expressed in French feet, are as 

 follows : 



a. Upper limits. 



Ficus Carica, and limit of the cultivation of the vine, 1500'. (At Agordo, 

 Vitis grows very luxuriantly at a level of 2000', but no wine is made. 



Castanea vesca, 2000' at Agordo. 



Juglans regia, 3500' at Frassene. 



Zea Mays, 2500' in the valley of Cordevolethal. 



Cerealia, excluding wheat, 4400' at the Col di S. Lucia; 4600' at 

 Buchenstein. 



Dense Forest of Coniferee, 5500'. In the regions of the mountain-pine, 

 individual larches and fig-trees ; 6309' at Sasso di Palma. 



Fagus sylvatica, 5000' ; e. g. at Monte Luna, 4915', still higher at Bosco 

 Medona and in the Val Pegolera. 



Pinus Cembra, 6665' at the Col di Lana. 



Upper limit of the Phanerogamia, = 9000' ; Aretia Vitaliana, and some 

 Saxifrages. 



b. Lower limits. 



^Ranunculus aconitifolius, 3500'. Hutchinsia rotundifolia, 7000'. 



montanus, 7000'. Papaver pyrenaicum, 5500'. 



glacialis, 8000'. Viola biflora, 3500'. 



Pyrenaicus, 8000'. Silene acaulis, 5500'. 

 Anemone baldensis, 4500'. jmmilio, 7000'. 



Aconitnm Anthora, 4500'. Cerastium latifolinm, 6500'. 



Napellus, 6500'. Cytisus alpinus, 1300'. 

 Stoerkiannm, 6500'. purpurens, 2000'. 



Arabis cterulea, 7000'. Trifolium alpinum, 5500'. 



Hutchinsia alpina, 7000'. Phaca astragalina, 6500'. 



