288 APPENDIX G. BOTANY. 



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 prairies. 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 semiverticillatis; spicis 

 subquinquefloris, lato-ovatis, floribus laxis basi et racheos longe lanoso-arach- 

 noideis; glumis inequalibus anguste-lanceolatis, in carina scabris; palea inferiore 

 lineari-lanceolata acutissima obscure 3-5-nervata, carina inferne ciliata. 



j8? spiculis 9-10 floris, rachi sparsa lanosa. Headwaters of the Trinity; May. 



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



Koeleria cristata, 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 latifoi.ia, 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 trib- 

 utaries of the Red river; June-July. No. 2033 Wright's Coll. N. Mex. 1851-52 

 is the same. 



Triticcm repens, Linn.; Kunth, Enum. 1, p. 440; Torr., Fl. N. York; 2, p. 

 474. Common on the tributaries of Red river; May-June. All the specimens 

 are awnless. 



Elymus Canadensis, Linn.; Kunth, Enum. 1, p. 451; Torr., Fl. N. York, 2, 

 p. 476. E. glaucifolius, Willd. Cache creek, &c; June. 



