GEOGRAPHICAL BOTANY. 337 



original plants, is identical with 0. apiculata Wallr. 

 Rchb. (Spicil. rum., 2, p. 58) ; 0. macrosepala is pro- 

 bably my 0. Bartlingii, a name which obtained priority 

 by several months. 



French local Floras : J. Lloyd, ' Flora de la Loire in- 

 ferieure' (Nantes, 1844, 12); Guepin, 'Supplement a la 

 Flore de Maine et Loire' (Angers, 1842). 



Martins has worked out an exposition of the climatal 

 contrasts which occur within the boundaries of France 

 (les Regions Climatoriales de la France), in the ' Biblio- 

 theque de Geneve, 1844, pp. 138-60, and pp. 347-50. 

 The author distinguishes the five following climates in 

 France. 



1 . Climate of the Vosges. This comprises a district in 

 the north-east of France, which is bounded by the citiss 

 of Basle, Dijon, Auxerre, and Mezieres. Mean tempera- 

 ture = 9 6C. The relatively most intense winters pre- 

 dominate in this region, the difference between the mean 

 summer and winter heat amounts to 18 C. (18 6 and 

 6 C.) ; the greatest cold observed in Strasburg and 

 Metz amounted to about 23 C. The mean quantity of 

 rain (from meteorological observations made at Strasburg, 

 Muhlhausen, Nancy, Metz, and Geneva) =669 mm. ; 

 of this, 19 p. c. fall in the winter, 23 in the spring, 31 

 in the summer, and 27 in the autumn. Average num- 

 ber of rainy days = 137. Predominant winds, those 

 from the south-west and north-east. 



2. Climate of the Seine , or north-west of France, as 

 far as the Loire and Cher. Mean temperature 10 9 C. 

 Difference between the mean summer- and winter-tem- 

 perature = 13 60.; diminishing in the direction from 

 Brussels (=14 3 C.) to Brest (= 10 8 C.) ; the former 

 average value is the arithmetical mean of observations 

 made at Dunkirk, Arras, Abbeville, Paris, Cherbourg, 

 Angers, and Denainvilliers. Average amount of rain 

 = 548mm.; in Finisterre, however, it amounts to 900mm. 

 (from observations made at Paris, Brussels, and Denain- 

 villiers, 21 p. c. of the rain falls in winter, 22 in spring, 30 



22 



