149 [ t J 



From the appearance of the specimens, I should suppose the plant 

 were a perennial, but according to Dr. James it is an annual. 



Convolvulus nuttallii. C. hastatus, Nutt. in trans. Jlmer. 

 phil. soc. (n. ser.) 5 p. 194; not of Thunb. Valley of the Del 

 Norte. 



One or two other Convolvulacese were in the collection, but I 

 have not determined them to my satisfaction. 



SOLANACEtE. 



Nycterium lobatum. Between Fort Leavenworth and the head 

 of the Arkansas. 



Datura Metel, Willdl Valley of the Gila. It grows from four 

 to five feet high, with spreading branches. Perhaps introduced. 



Solanum triflorum, Nutt. Upper part of the Arkansas, and on 

 the tributaries of the Arkansas. 



Another species of Solanum was found on the Del Norte below 

 Santa Fe. The whole plant is clothed with a dense yellowish 

 white pubescence. The stems are rough, with minute slender 

 prickles. Leaves linear-oblong, entire, rather obtuse, prickly 

 along the midrib. Flowers, two or three together at the summit 

 of the branches, white 1 stamens 5; anthers equal. 



GENTIANACE^. 



Eustoma Russelianum, Don. Near the bank of the San Pedro. 

 A showy plant. 



Erythrjea Beyrichii, Torr. and Gr. E. tricantha /3 Griseb. Val- 

 ley of the Del Norte, and along the Gila. 



OLEACE.E. 



Fraxinus velutina, n. sp. Branches, petioles, and under surface 

 of the leaves, clothed with a dense soft pubescence. Leaflets 3 to 

 5, rhombic-ovate, cuneate at the base, coarsely serrate or toothed, 

 sparingly pubescent above. Fruit narrowly oblanceolate, nearly 

 entire at the apex, about three-fourths of an inch long. A small 

 tree, usually from 15 to 20 feet high. Grows in the region between 

 the waters of the Del Norte and the Gila; also on the Mimbres, a 

 tributary of the latter river. 



NYCTAGINACE.E. 



Abronia mellifera, Hook. Valley of the Del Norte. 



A. (Tripterocalyx) micranthum, Torr. in Frem. 1st report, p. 96. 

 Valley of the Del Norte. 



This differs in some respects from Fremont's plant. The pedun- 

 cles are elongated, and the fruit is more than an inch long, with 

 .very broad wings. The structure of the seed is precisely the same 



