282 Mr. D. Don's Descriptions of new Genera and Species 



Chuquiraga. Juss. 



JOHANNIA. Willd. 



BacasiyH sp., Ruiz et Pavon. 

 Flosculi regulares, 5-partiti, hermaphroditi. Pappus uniformis. 



Involucrum turbinato-campanulatum, multiplici ordine poly- 

 phyllum, imbricatum : squamis adpressis, cartilagineis, ex- 

 tends gradatim minoribus, costa valida apice in mucronem 

 rio-idum subulatum excurrente ; intimis elongatis, acumi- 

 natis, radium constituentibus. Receptaculum dense villoso- 

 lanatum. Flosculi indefiniti, hermaphroditi, tubulosi, alte 

 5-partiti, villosi : fame intus dense barbata ! segmentis line- 

 aribus, strictis, apice penicillatis ! nervis marginalibus pro- 

 minulis. Stamina disco epigyno inserta : filamenta com- 

 planata, libera, basi tubi corolla? adhaerentia : antherce in 

 tubum connatae, appendice lineari-ligulata cartilaginea co- 

 ronatee, basi biseta? v. bidentatae. Stigmata lineari-lingu- 

 lata, conniventia, papilloso-pruinosa. Achenia turbinata, 

 undique villosissima. Pappi radiis copiosis, valde plu- 

 mosis, inferne crassioribus, simplici ordine digestis, ima 

 basi connatis, apice simplici. 



Frutices sempervirentes, erecti, rigidi, ramosissimi, inermes v. spi- 

 jwsi. Folia alterna, margine integerrima, callosa, pungenti- 

 mucronata, coriacea, nitida ; aut omnind subulata, spinosa. 

 Capitula terminalia, solitaria, sessilia, erecta, magna, v.plura 

 paniculata. Involucra extus fulvescenti-villosissima, nunc 

 glabriuscula : squamis luteo-coloratis. Flosculi aurei. 



Obs. — Folia sapore amarissimo gauclent. 



* Capi talis 



