240 APPENDIX. 



are also many species in the Atlantic States, and several inhabit the country as far 

 westward as New Mexico and Arizona, but not one has been found in California. 

 Among Csesalpinese, Hoffmannseggia is remarkable in having two endemic species in 

 South Africa ; otherwise the genus is American, and essentially western. Four or five 

 genera are monotypic, but two at least of them are obscure plants. The Mimosege 

 are essentially tropical, and largely American, both generically and specifically ; the 

 numbers in the Old World, especially in Australia and Africa, being small after 

 deducting the species of Acacia. Bentham* divides them into twenty-nine genera, 

 nineteen of which are represented in America, and eight of them are peculiar to 

 America; and he describes 1263 species, of which 763 are American, leaving 500 

 species, including 293 Australian and fifty-seven African species of Acacia, for the rest 

 of the world. In Mexico and Central America there are fifteen genera, none peculiar ; 

 and 199 species, whereof 110 are endemic, and nine only extend beyond America. 



Rosacece. 

 All the tribes of this order, with the exception of the African Neuradese, are 

 represented ; and about one third of the genera and one tenth of the species are from 

 within our limits, that is, if we disregard the multitude of proposed critical species 

 of Rosa and Eubus. Of the tribe Quillajese, which is wholly American, save two 

 Australian species of the otherwise Chilian genus Eucryphia, there are three endemic 

 genera, namely Vauquelinia and the monotypic Pterostemon and Lindleya; Eubus 

 numbers about five-and-twenty distinct and varied species ; and of the widely spread 

 tribe Potentillese of temperate regions there are three shrubby genera peculiar to 

 Mexico and the countries immediately to the north, from Texas to California. These 

 are Cercocarpus, Cowania, and Fallugia. Alchemilla, of wide range in temperate and 

 frigid regions, including South Africa and Australia, is present in Andine species ; and 

 Rosa reaches its southern limit in Coahuila, where there is one endemic species. A 

 second species of Rosa is found on the Mimbres in Southern New Mexico, just within 

 our boundary. 



Saxifragacece. 

 Nine genera and nineteen species are the numbers of this order. No genus is 

 endemic, but four, Eeuchera and the monotypic Lepuropetalon, Fendlera, and Phyllo- 

 noma, are restricted to America. The first and third find their southern limit in 

 Mexico, while Lepuropetalon, a minute herb, ranges from South Carolina to Georgia, 

 Texas, and Sonora, and reappears in Chili and Uruguay ; and Phyllonoma inhabits 

 Mexico and Colombia. One species of Deutzia, an otherwise Himalayan and Eastern 

 Asiatic genus, is an interesting occurrence, though it must be admitted that the genus 

 is not easily separated from the more widely-ranging Philadelphus, which is likewise 

 * " Od the Mimoseae," Transactions of the Linnean Society, xxx. p. 350. 



