ANNOTATIONS AND ADDITIONS. 323 



seen two Malvaceae, Sida Phyllanthos (Cavan), and Sida pichinchensis, 

 ascend, on the mountain of Antisana and the Volcano Rucu-Pichincha, 

 to the great elevation of 12,600 and 14,136 French (13,430 and 

 15,066 English) feet. (See our Plantes 4quin., t. ii. p. 113, pi. 

 116.) Only the Saxifraga boussingaulti (Brogn.) reaches, on the 

 slope of the Chimborazo, an altitude six or seven hundred feet higher. 



( 1S ) p. 240." The Mimosa form." 



The finely feathered or pinnated leaves of Mimosas, Acacias, 

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

 tropical vegetation. Yet there are some representations of this form 

 beyond the tropics; in the Northern Hemisphere in the Old Conti- 

 nent I can indeed cite but one, and that only in Asia, and a low- 

 growing shrub, the Acacia Stephaniana, according to Kunth's more 

 recent investigations 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 Bux- 

 baum, and extends as far north as 42 of latitude. (Tableau des 

 Provinces situees sur la Cote occidentale 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 Mississippi and the 

 Tennessee,- as well as the savannahs of Illinois, are adorned with 

 Acacia glandulosa (Michaux), and A. brachyloba (Willd.). Mi- 

 chaux found the Schrankia uncinata extend northwards from Florida 

 into Virginia, or to 37 N. latitude. Grleditschia tricanthos is found, 

 according to Barton, on the east side of the Alleghany mountains, 

 as far north as the 38th parallel, and on the west side even as far 

 as the 41st parallel.^ Gleditschia monosperma ceases two degrees 

 farther to the south. These are the limits of the Mimosa form in 

 the Northern Hemisphere. In the Southern Hemisphere, we find 

 beyond the tropic of Capricorn simple leaved Acacias as far as Van 

 Diemen Island; and even the Acacia cavenia, described by Claude 

 Gay, grows in Chili between the 30th and 37th degrees of south 

 latitude. (Molina, Storia Naturale del Chili, 1782, p. 174.) Chili 



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