137 I 7 ] 



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APPENDIX BY PROFESSOR TORREY. 



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RANUNCULACE.E. 



Ranunculus aquatilis, Linn. Plains of the Arkansas. 



Clematis Virginiana, Linn. Raton mountain. An undeter- 

 mined species of this genus was found in fruit, November 10th, on 

 the Gila. The plumose tails of the carpels are nearly three inches 

 long. 



BERBERIDACE^:. 



Berberis pinnata, Lagasca. Highlands bordering the Gila; this 

 appears to be a common species in the southern part of Upper Cali- 

 fornia, and in Northern Mexico. 



CRUCIFER^. 



Lepidium ruderale, Linn. Valley of the Arkansas. 

 Erysimum Arkansanum, Nutt. Tributaries of the Canadian'. 



CAPPARIDACE^C. 



Polonisia graveolens, Raf. In flower and fruit, Sept. 26 — 

 October 3, valley of the Del Norte. The plant is taller, and the 

 flowers are considerably larger than in the form that is common in 

 the northern United States. 



Cleome integrifolia, Nutt. This beautiful species is abundant 

 on both sides of the mountains, from the plains of Oregon, and the 

 upper waters of the Platte, to latitude 33° north. 



VIOLACE^E. 



Viola cucullata, Linn. Pawnee fork of the Arkansas. 



PORTULACACE^E. 



Portulaca oleracea, Linn. On the Arkansas. Perhaps intro- 

 duced. 



Sesuvium portulacastrum, Linn. In flower and fruit, Nov. 

 17. Saline soils along the Gila. Leaves spatulate. Flowers nearly 

 sessile, stamens numerous. Styles 3. 



GERANIACEyE. 

 Geranium Fremontii, Torr. in Frem. 2d Rep. On the Raton. 



ZYGOPHYLLACE.E. 



Kallstrcemia maxima, Torr. and Gr. Tribulus maximus, Linn. 

 Tributaries of the Canadian. 



