APPENDIX G. BOTANY. 269 



Sesleria dactyloides, Nutt. Gen. 1, p. 65 ; Kunth, Enum. 1, p. 323 ; 

 Torr. in Emory's Report, p. 323, t. 10. Upper tributaries of the Red 

 River ; July. This is the well known Buffalo-grass of the western prai- 

 ries. It is remarkable that neither the grain nor the fertile flowers of 

 this grass are known. 



Poa (Eragrostis) oxylepis. P. interrupta, Nutt. in Trans. Amer. 

 Phil. Soc. (n. ser.) 5, p. 146; not of Lam. Witchita Mountains; July. 

 A very neat grass. The specimens of Captain Marcy are only about 18 

 inches high. 



P. eragrostis, Linn. : Kunth, Enum. 1, p. 333 ; Torr. Fl. N. York, 

 2, p. 458. North Fork of Red River ; July. 



P. arachnifera: panicula oblonga contracta, ramulis semi verticil! atis; 

 spicis subquinquefloris, lato-ovatis, floribus laxis basi et racheos longe 

 lanoso-arachnoideis ; glumis inequalibus anguste-lanceolatis, in carina 

 scabris ; palea inferiore lineari-lanceolata acutissima obscure 3-5-nervata, 

 carina inferne ciliata. 



3? spiculis 9-10 floris, rachi sparsa lanosa. Headwaters of the Trin- 

 ity; May. 



Melica glabra, Michx. Fl. 1, p. 62. Witchita Mountains ; May 30. 



Koeleria crist ata, Pers. Syn. 1, p. 97 ; Kunth, Enum. 1, p. 381. 

 K. nitida, Nutt. Gen. 1, p. 74. K. tuberosa, Nutt. in Amer. Phil. Trans, 

 (n. ser.) 5, p. 148. Headwaters of the Trinity. 



Festuca nutans, Willd., Enum. 1, p. 116 ; Kunth, Enum. 1, p. 407; 

 Torr. Fl. N. York, 2, p. 471, t. 158. Witchita Mountains ; June. 



F. tenella, Willd. 1. c. ; Kunth, Enum. 1, p. 397 ; Torr., Fl. N. York, 

 2, p. 470, t. 154. Headwaters of the Trinity ; taller than the plant of 

 the Atlantic States. 



Uniola latipolia, Michx., Fl. 1, p. 71 ; Ell. Sk. 1, p. 167 ; Kunth, 

 Enum. 1, p. 425. Witchita Mountains ; July. A tall showy grass, 

 with very large much compressed spikelets. 



U. stricta, Torr., in Ann. Lye. N. York, 1, p. 155. U. multiflora, 

 Nutt., in Trans. Amer. Phil. Soc. (n. ser.) 5, p. 148. Washita River 

 to the upper tributaries of the Red River ; June-July. No. 2033 

 Wright's Coll. N. Mex. 1851-52 is the same. 



