668 GEOGRAPHICAL DISTRIBUTION OF 



*' Alopecurnx is a Piicilic-coast genus, 7 of its 9 species being 

 found iu Oregon, wJiile only one other state, Colorado, has more 



than 3. 



" Andropogon. If we omit those species which have commonly 

 been called (linjsopogon and Sonjhum, we shall still have 33 left, 

 and these are largely southern and eastern. Florida leads the list 

 with 25, of which 7 are peculiar to that state. 



" Arisfida is well distributed over tlie entire country, though 

 more abundant in the south and west. A. pu rpu rmcens is the 

 common type of the genus, being credited to 31 states. 



" Boufelom finds its home on the eouthorn plains, 18 of its 22 

 species being found in Texas, and 4 are confined to that state. 



" Browns, with its 20 species, is found from the Atlantic to the 

 Pacific, though more abundantly in the far "West, 14 species being 

 found in California and 10 in Colorado, against 7 in New England, 

 1 in Florida, and 5 in Tennessee. B. secaHnus and B. Kalmii are 

 the most widely distributed species, and 10, half the entire number, 

 are immigrants, mostly on the Pacific coast, and the number of 

 these will doubtless be largely increased in the near future. 



"The famous Buchloe, which was formerly supposed to cover the 

 entire Western plains with a dense mat of turf, seems now to be 

 confined to eight or ten states, and to be nowhere abundant. 



" CalamagroKfis is essentially a Northern genus, reaching its 

 greatest development along the slopes of the IJocky Mountains and 

 among the hills of New England. New England and Minnesota 

 have 9 each, Oregon 11. 



•* Oonohrics (ribuloides makes trouble from ^Maine to California, 

 and from ^linnesota to Florida, but is not reported from the ex- 

 treme Northwest. 



** Of the 9 species of Chloris only 1 is found beyond the southern 

 tier of states, and even that does not venture beyond Kansas and 

 Tennessee. 



" Cinna, whether it have 1, 2, 3, or 4 species, as published by 

 different authors, covers nearly the entire country with some of its 



many forms. 



''Dantlionia, with its 7 species, is quite local, 3 species being 



