GEOGRAPHICAL BOTANY. 339 



the Pyrenees. Mean temperature =14 8 C. Mean 

 summer temperature = 22 6 C., and winter temperature 

 = 6 5C. Greatest intensity of cold observed 1 1 5 C. 

 Average amount of rain = 651 mm. ; of which 25 p. c. 

 fall in the winter, 24 in the spring, 11 in the summer, 

 and 41 in the autumn. Prevailing wind, north- west. 

 (Mistral.) 



A work by Grenier, relating to the botanical condi- 

 tions of the French Jura, appears of importance ; at 

 present, however, I am only acquainted with it from Von 

 Schlechtendal's review (These de Geographic Botanique 

 du Dep. de Doubs, Strasbourg, 1844-8). According to 

 this work, the upper limit of the oak here occurs at an 

 altitude of 6-700 metres, that of the beech at 8-900 

 metres ; above these deciduous trees comes the Coniferous 

 region, covered with both kinds of fir-trees. 



Lloyd's Flora of the Mouth of the Loire also notices 

 the local conditions of vegetation. The diffusion of several 

 plants belonging to the south of Europe, along the sea- 

 beach, as far as the 47th degree of latitude, is charac- 

 teristic : e. g. on the lagunes, Inula crithmoides, Sonchus 

 maritimus, several Statices, Salicornia fruticosa, Scirpus 

 Savii y Spartina strict a ; on the downs, Matthiola sinuata, 

 Silene portensis, Tribulus terrestris, Otanthus maritimus, 

 Ephedra distachya, Pancratium maritimum, &c. But on 

 the heaths of Bretagne are also found Erica ciliaris, 

 vayans, and scop aria, Simethis bicolor Kth. (Phalangium 

 D. C.), Aspkodelus albus, Pingmcula Lusitanica., Serapias 

 triloba, in conjunction with northern plants, as Ulex 

 Europ&us, Narthecium ossifrayum, Anagattis tenella, Hy- 

 pericum elodes, Myrica Gale, and Alisma ranuncidoides. 



To this place belong, on the French coast of the 

 Mediterranean, the investigations of Duchartre upon the 

 vegetation of the district around Beziers in the Dep. 

 Herault (Comptes rendus, 1844, v, 18, pp. 254-9). This 

 work gives an accurate and complete survey of the vege- 

 table formations which occur there. The author divides 



