CHLORIDES. 4 1 7 



ous bluffs and liills, occupying such peculiar situations to the profit 

 of the stock visiting them in their wide ranging. 



4. B. hirsuta Lag. Var. Cienc. 2: Part 4, 141 (1805). Chondro- 

 snm hirtum H. B. K. Nov. Gen. et. Sp. 1 : 176, /. 59 (1815). 

 Actinochloa hirsuta R. & S. Syst. 2: 149 (1817). Atlieropogoniyapil- 

 losus Engelm. Am. Jour. Sci. 46 (1843). Cho7idrosu7n fmnum 

 Torr. Marcy Rep. 157 (1848). Bouteloua fcena Bigelow, Whipple 

 Exped. Add. p. ii. (1856). 



Culms slender, 20-50 cm. higli. Blades narrow, papillose- 

 hairy or glabrous. Spikes 1-4 in number, pectinate, dense, about 

 2 cm. long, on short hairy pedicels, bracts about twice as long, 

 axis projecting beyond the spikelets 7 mm. Sterile florets much 

 projecting from the side of the fertile. Empty glumes villous, 1- 

 nerved, first hyaline, narrow, 2 mm. long; second warty-hairy, 

 lanceolate, 4 mm. long; floral glume pubescent, 3-lobed for nearly 

 half its length, nearly 5 mm. long including the central seta, lateral 

 seta? shorter; palea shorter, obtuse, ciliate on the nerves, rachilla 

 smooth, 1 mm. long, bearing funnel-shaped or 2 fan-shaped empty 

 glumes 1 mm. long, with 3 equal seta3 3 mm. long, enclosing 1-2 

 very small empty glumes. 



A common grass on rocky or dry soil of hills and plains of Chi- 

 huahua; culms rather wiry; quality equal to tlie most of the species 

 enumerated; furnishes an important proportion of the forage of 

 the region. 



Illinois, Patterson ; Florida, Garber; Texas, Drummond ; 

 Mexico, Pringle 409, Palmer 29, Parry & Palmer 943. 



From Florida to British America and Mexico. 



Var. Palmeri Vasey. B. Bolatideri Vasey. Much larger, often 

 a metre high; spikes 3-6 in number, broader, often 4 mm. long. 



Mexico, Pahiicr. 



5. B. oligostachya (Xutt.) Torr. A. Gray, Man. Ed, 2:553 

 (1856). Gkama. Mesquite-grass. Actinocldoa gracilis AVilld. 

 R. & S. Syst. 2: 418 (1817). Atherojwgon oligostachyus Nutt. Gen. 

 1:78 (1818). Eutriania oligostachya Knnth, Rev. Gram. 96 

 (1829). Chondrosum oligostachyum Torr. Marcy's Rep. 300 

 (1853). 



