42 FLOnA OF SOUTH AMERICA AND THE PACIFIC. 



cens, ramis angulatis, foliis remotis lineari-elongatis acutissi- 

 mis submucronatis subtus praecipue dense albo-pubescentibus, 

 capituliscorymbosis, involucrisubhemisphgericisquamislanceo- 

 latis acutis uninerviis dorso albo-pubescentibus reliquis nudis 

 subscariosis. — Santa Fee (in the Argentine Republic ?) 

 Tweedie. — Our specimen is a solitary one, and the flowers 

 (male) scarcely perfect : but it seems very distinct. 



1099. [oQ.) B.^e«e//a(Hook.etArn.); totapubescenti-inca- 

 na suffruticosa, ramis angulatisjfoliisalternis remotis lineari-sub- 

 ulatis integerrimis acutis rigidiusculis obscure uninerviis, capi- 

 tulis terminalibussolitariis majusculis, invoUicri lato-campanu- 

 lati squamis ovatis acutis imbricatis apicibus nudis coloratis — 

 a. gracilior. N. Patagonia, at Bahia Blanca and Arroya de 

 Napoota. Tweedie. — /3. magis rohiista. St Julian (S. Pata- 

 gonia ?) C Darwin, Esq. (n. 379.) — Our plants are all males. 



§ 5. Caulopterffi, nempe foliis ohlongis linearibtis aut subnullis, 

 ramis alas foliaceas e folioriim hasi utrinque deciirrentes 

 gerentibiis. DC. 



1100. (57.) B. Gaudichaudiana. DC. Prodr. v. p. 4.24. 

 St Catharine, Brazil. Ticeedie. Rio Grande do Sul. Isabelle. 

 — De Candolle says, " this very much resembles B. articulata^ 

 but it is not glaucous ; the articulations are elliptical and 

 broader, 7-8 lines long and 3 lines wide." Some of our spe- 

 cimens are most beautifully and regularly jointed like an 

 Opiintia, but others pass gradually into the following species. 



1101. (58.) B.articidafa. Pers.—DC. Prodr. v. p. 424. 



Conyza. Lam. Molina, Less Monte Video. Sella. Rio 



Grande. Ticeedie. Maldonado and the Pampas of Buenos 

 Ayres. Gillies, and N. Patagonia. Tweedie.— E\ Morro, Pro- 

 vince of San Luis. Dr Gillies. — Nothing can be more vari- 

 able than this plant (which however, can hardly be called 

 glaucous) in the length of its articulations, the breadth of the 

 wings, often having a waved edge, and the number (2-4) and 

 more or less crowded position of the capitula : so that we 

 thmk it possible that the number of described species in this 

 section will require to be greatly reduced, and that probably 



