APPENDIX G. BOTAKT. 253 



Cassia Cham.eoe.ista, Linn.; Torr. and Gr. Fl. 1, p. 395. Tribu- 

 taries of the Washita; fl. July 22. 



Schrankia UNCiNATA, Willd. ; Torr. and Gr., Fl. 1, p. 400. Mouth 

 of Medicine River, &c. ; fl. April. 



Acacia lutea, Leavenw.; Torr. and Gr., Fl. 1, p. 403. On the 

 Witchita Mountains ; fl. and fr. July 14. The leaves are remarkably 

 sensitive. 



. ROSACEA. 



Sanguisorba annua, Nutt, in Torr. and Gr., Fl. 1, p. 429. Pote- 

 rium annuum, Hook. Fl. Bor. — Am. 1, p. 198. 



ONAGRACE^E. 



Oenothera rhombipetala, Nutt., in Torr. and Gr., Fl. 1, p. 493 ; 

 Knnze, in Linnsea, 20, p. 5*7. Main Fork of Red River; fl. June 24. 



GE. sisfuata, Linn.; Torr. and Gr., Fl. 1, p. 294. Witchita Mountains 

 and upper tributaries of Red River ; May-June. 



(E. speciosa, Nutt., in Jour. Acad. Phil. 2, p. 119; Torr. and Gr., 

 Fl. 1. c. Big Witchita ; fl. May 8. Middle Fork of the Red River ; fr. 

 June 21. 



(E. lavandul^folia, Torr. and Gr., Fl. 1, p. 501 ; Hook. Lond. Jour. 

 Bbt. 6, p. 223 ; Gray, PI. Wright. 1, p. 7.2. Big Witchita and North 

 Fork of- Red River ; fl. May 8, fr. June 6. The leaves in all our speci- 

 mens of this rare species are nearly glabrous, about one inch and a half 

 long, and 2-3 lines wide, with the apex rather acute. The fruit is well 

 described by Hooker, (1. c.) 



(E. serrulata, Nutt. Gen. 1, p. 246; Torr. and Gr., Fl. 1, p. 501. 

 Common on the upper tributaries of the Red River ; May-June. 



Gatjra cocchstea, Nutt. Gen. 1, p. 249; Torr. and Gr., Fl. 1, p. 518. 

 North Fork of Red River ; fl. June 6. 



G. vtllosa, Torr. Ann. Lye. N. York, 2, p. 200; Torr. and Gr., Fl. 1, 

 p. 518 ; Gray, PI. Wright. 1, p. 13. Witchita Mountains ; fr. July 14. 

 The ripe fruit is not always refiexed. It is (including the stripe) about 



