collected by Mr. Schomburgk in British Guiana. 107 



whole series, and as circumstances have led me to complete in the 

 first instance some of the larger and more distinctly marked oders, 

 I have thought it might be of service to the subscribers to publish 

 them in the mean time, commencing with the Compositce, which ac- 

 quire an additional interest from the recent completion of that por- 

 tion of DeCandoUe's Prodromus. 



The Museum of Natural History of Paris having recently distri- 

 buted a collection of above 300 species from French Guiana, and si- 

 milar sets collected in the same country by M. Leprieur having been 

 presented to several botanists by Baron Benjamin Delessert, I have 

 thought it might be useful to include these two collections in my 

 enumeration, both as enabling their possessors to identify their spe- 

 cimens, and as affording occasionally data for the geographical distri- 

 bution of particular species. 



With a view to the interest of Mr. Schomburgk,whose losses, owing 

 chiefly to repeated attacks of fever, have been very severe, I should 

 add that several sets of about 500 species each remain undisposed of. 



COMPOSITiE. 

 Tribe VERNONiACEiE. 



1. Sparganophorus Vaillantii, Gaertn. DC. Prod. 5. p. 11. — Banks of the 

 Courantine and of the Cun-asawaak. Schomburgk, n. 154 & 20G. 



2. Vernonia odoratissima, H. B. K. DC. Prod. 5. p. 38. — Rocky places 

 in Savannahs on the Rupunoony. Schomburgk, n. 97. 



3. Vernonia scorpioides, Pers. DC. Prod. 5. p. 41. — British Guiana. 

 Schomburgk, n. 258. 



4. Vernonia tricholepis. DC. Pi'od. 5. p. 54. — British Guiana. Schom- 

 burgk, n. 282. — French Guiana. Herb. Par. n. 152. 



/3. Microcephala, foliis oblongo-lanceolatis, capitulis parvis. — British Gui- 

 ana. Schomburgk, n. 149. 



Perhaps a different species, but my specimens are too imperfect 

 to determine. 



5. Centratherum muticum, Less. DC. Prod. 5. p. 70.^ — British Guiana. 

 Schomburgk, n. 254. 



6. Elephantopus carolinianiis, Willd. DC. Prod. 5. p. 86. — British Gui- 

 ana. Schomburgk, n. 473 or 413. 



This plant, which I have also from various parts of Brazil, is pre- 

 cisely similar to several of my North American specimens. They 

 have the main stem usually corymbose, not dichotomous, and the 

 floral leaves larger than in E. mollis, though seldom longer than 

 broad. The E. nudicaulis, judging from Drummond's Covington 

 and Jacksonville specimens, appears to be very near the true E. 

 mollis. All these species, however, as well as the East Indian E, 



