148 Ex Doc. No 41 



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loosely coiled thread which frequently ramifies with anastomosing 

 "branches. The whole testa is formed' of thesfe singular vessels. 

 Embryo nearly as large as the seed- cotyledons foliaceous; radicle 

 pointing downward. There can he little doubt of the propriety of 

 uniting Bronnia and Fouquieria. Each genus was founded on a 

 single species, and both plants seem to be very little known to Eu- 

 ropean botanists. Of the former the flowers are imperfectly de- 

 scribed, and of thelatterj the fruit is unknown. Our plant partakes 

 of the characters of both genera. In the ovary the placentae meet 

 in the axis, but only slightly cohere; finally they unite, but in 

 -fruit the valves of the capsule separate from the axis, to which the 

 seeds remain attached. As to the affinities of Fouquieria, I am in- 

 clined to adopt the opinion of Lindley, that it is very near Pole- 

 moniaceae, and particularly to Cantua. It differs, however, in its 



distinct 

 ) 



(wh 

 hypogynous stamens; and very sparing 



albumen, as well as in habit. It is certainly very unlike Franke- 

 niacese, to which it is appended by Endlicher. Kunth placed it 

 among genera allied to Portulacacese. 



W 



CONVOLVULACE^. 



Ipomoea leptophylla, Torr. in Frem, 1st reporty p. 94. Uppet 

 part of the Arkansas and head waters of the Canadian. The stems 

 are often, erect, about two feet high, and of a bushy appearance. 

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

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

 %' . One -or two other Convolvulacese were in the collection,, but 1 

 have not determined them to my satisfaction. 



SOLANACE.E. 



Nycterium lobatum. Between Fort Leavenworth and the head oi 



the Arkansas. 



■ Datura metel, Willd.l Valley of the Gila. It grows from four 

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

 Solanufti triflorum, Jfutt. Upper part of the Arkansas, and on the 

 tributaries of the Arkansas. 



Another species of Solanum was found on the Del Norte belo 

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

 pubescence. The stems are rough, with minute slender prickly • 

 'Leaves linear-oblong, entire, rather obtuse, prickly along the eqi^' 

 rib. Flowers, two or three together at the summit of the branches; 

 white.*? stamens 5: anthers equal. 



GENTIANACEiE. 



Eustoma Russelianum, Don. Near the bank of the San Pe^^"' 

 A showy plant. . , , 



Erythraea Beyricbii, Tor r. and Gr. E. tricanthaB. Griseh. *^^' 

 ley of the Del Norte, and along the Gila. 



