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



culum spinulosum, hujus stirpis optimum characterem con- 



stituens, clesignare volui. 

 The Onoseris salicifolia of M. Kunth may possibly belong to 

 this genus ; but not having had an opportunity of examining a 

 sample of it, I am unable to determine this point at present. It 

 cannot belong to Onoseris, which has the habit of the Perdicece, 

 and with which tribe the genus must be associated. 



l.C. albicans. 



Hieracium albicans. Herb. R. et P. 

 In Peruvia. Ruiz et Pavon. f? . 



ClIiETACHLiENA. 



Receptaculum favosum. Flosculi disci hermaphroditi, tubulosi, 

 5-dentati ; radii foeminei, ligulati. 



Involucrum semiglobosum, polyphyllum : squamis numerosis- 

 simis, quadruplici circiter serie imbricatis, lanceolatis, in 

 setam longam, recurvato-patentem prodeuntibus. Recep- 

 taculum favosum, dentato-scabrum. Flosculi radii plures, 

 foeminei, ligulati, unilabiati, trilobati, 6-nervii (nervis per 

 pariadiscum laciniarum occupantibus) foeminei? staminum 

 rudimentis ; disci hermaphroditi, tubulosi, o-dentati, tubo 

 infra medium angustiore, fauce cylindrical, latere exteriore 

 profundius fissi : nervis 5 primariis ad laciniarum sinus di- 

 visis : dentibus linearibus, obtusis. Antherce appendiculA 

 lineari-lanceolata, acutiuscula, coriacea coronatre, basi setis 

 2, longis, tenuissimis, simplicibus munitae. Stigma herma- 

 phroditis inclusum, emarginatum, obtusum ; fcemineis ex- 

 sertum, magnum, indivisum, clavatum, pruinosum. Achcnia 

 cuneato-oblonga, pilosiuscula. Pappi radiis persistentibus, 

 triplici ordine digestis, copiosis ; interioribus compressis, ri- 



gidis, serrulatis ; extimis brevissimis, pilosis. 



Herba 



