to Oregon and California. 87" 



perseverance and industry, which only saved them from utter 

 loss. From the remains of the dried plants, recovered from 

 such sad mishaps. Dr. Torrey, to whom they were submitted, 

 has published, in an Appendix to the Report, a list of species, 

 and has been enabled to determine and describe some new 

 species. The specimens of Compositce^ collected in the first 

 expedition, were confided to Dr. Gray, from which he has 

 enumerated and described several species, and some new ge- 

 nera, which have been published in the Boston Journal of 

 Natural History, Vol. V. No. 1, accompanied by figures of 

 two, viz : Mondptllon bellidifonnis, and Amsbcoma acaulis ; 

 the latter, an annual plant, belonging to the order Compositse- 

 cichoracese, with yellowish flowers, on simple naked scapes, 

 and with linear-pinnatified leaves. The Monoptilonbellidifor- 

 mis, (^Torrey c^* Gray, ined.) is described as a "highly cu- 

 rious plant, and probably gathered in the southern ranges of 

 the Rocky Mountains. The generic name is expressive of its 

 most striking peculiarity, that of a pappus, composed of a 

 solitary plumose bristle." Plant annual, small, depressed 

 villose pubescent ; leaves few, oblong, or linear-spathulate, en- 

 tire : heads of flowers, {capiiula,) subsessile or bracteate. 

 Flowers ; disc yellow, ligules seemingly white, tinted with 

 blue or lilac. The resemblance, judging from the accompa- 

 nying figure, is somewhat that of a daisy, and of which the 

 flowers are particularly conspicuous. 



Besides these, mention is made of an addition to Hooker's 

 Genus of Townsendia, in T. Fremontu, Torrey ^* Gray, 

 ined.; — of specimens belonging to the "group of biennial 

 asters, which form Mr. Nuttall's genus Dieteria, and which 

 are characteristic productions of the wide arid tracts, which 

 occupy so large a space on this side and beyond the Rocky 

 Mountains. Also, a new genus, in the yellow or homochrous 

 series of asteroid plants," viz: Amphip^ppus ; bearing in its 

 specific, the name of the discoverer, viz : A. Frem6nta. 



This article, to which we have thus alluded, in connection 

 with the Report, under notice, makes mention, also, of Pyrroc 

 oma foliosa, T. iSf* G. a new species. Aplepdppus torti- 

 folius, T. 6^. G. n. sp. " Several novel plants, of the tribe 

 Senecionideae, which are not in sufficient good state for satis- 

 factory determination — a new Balsamorhiza, probably. "Ac- 



