ANNOTATIONS AND ADDITIONS. 143 



and 14136 French (13430 and 15066 English) feet. (See 

 our Plantes equin., T. ii. p. 113, pi. 116.) Only the Saxi- 

 fraga boussingaulti (Brongn.) reaches, on the slope of the 

 Chimborazo, an altitude six or seven hundred feet higher. 



() p. 22." The Mimosa form! 9 



The finely feathered or pinnated leaves of Mimosas, Aca- 

 cias, Schrankias, and species of Desmanthus, are most truly 

 forms of tropical vegetation. Yet there are some represen- 

 tations of this form beyond the tropics ; in the northern 

 hemisphere in the Old Continent I can indeed cite but one, 

 and that only in Asia, and a low-growing shrub, the Aca- 

 cia Stephaniana, according to Kunth's more recent investi- 

 gations a species of the genus Prosopis. It is a social 

 plant, covering the arid plains of the province of Shirwan, 

 on the Kur (Cyrus), as far as the ancient Araxes. Olivier 

 also found it near Bagdad. It is the Acacia foliis bipinnatis 

 mentioned by Buxbauru, and extends as far north as 42 of 

 latitude. (Tableau des Provinces situees sur la Cote occi- 

 dentale de la Mer Caspienne, entre les fleuves Terek et Kour, 

 1798, pp. 58 and 120.) In Africa the Acacia gummifera 

 of Willdenow advances as far as Mogador, or to 32 north 

 latitude. 



On the New Continent, the banks of the Mississipi 

 and the Tennessee, as well as the savannahs of Illinois, are 

 adorned with Acacia glandulosa (Michaux), and A. brachy- 

 loba ( Willd) . Michaux found the Schrankia uncinata extend 

 northwards from Florida into Virginia, or to 37N. latitude. 

 Gleditschia tricanthos is found, according to Barton, on the 



