48 ME. J. BALL OIN^ THE FLORA 



oinuibus plus miausve albo-villosis, radicalibus ante antheain eniur- 

 cidis, cum caulinis iiiferioribus in petiolum louguin sensim 

 attenuatis, superioribus paucis sessilibus, oblongo-lanceolatis , 

 remote repando-denticulatis, in pagina inferiore uervosis ; ramis 

 adricendeutibu3, oligocepbalis, subcorymbiferis ; pedunculis 

 tomentellis vix glandulosis ; involucri subcylindrici squamis irre- 

 gulariter imbricatis, litiearibus, acutis, fusco-villosis, intimis 

 pappo se(juilongis ; aebenio columnari, ecoronato (scil. costis non 

 pvomincntibus), pappo niveo. 



This is one of tbe group of Hieracia^ of which several are now 

 known from Central America and the Andes which by their 

 pure white pappus approach to the genus Crepis. But in America 

 it is clear that that character cannot be relied upon as of generic 

 importancCj as these plants arc all closely related to species of true 

 Ilieracium, In ap2:)earance my specimens approach II. tricTiO" 

 donta^ Sch. Bip. in Linnsea, xxxiii. p. 761; from which I think it 

 impossible to separate 11. jicbatum^ Fr. Yet. Ac. Forh. Stock. 1856, 

 p. 146, and Epicrisis 147 ; the latter, according to Fries, is the 

 same as H. frigidum^ Wedd. Chi. And. i. p. 225, tab. 42 b. But 

 my plant differs in many respects ; e. g. in being clothed in white 

 instead of reddish hairs, in the white pappus, and especially in the 

 form and structure of the involucre, which approaches nearly tliat 

 of the cymose group of the genus Pilosclla, while II, tricTiodonta 

 must be ranked in the subgenus Stenotheca. 



HTPOcn^ms elata, Grisel. PI. Lorentz. p. 138=Achyro- 

 phorus elatus, JVedd. Above Chicla in the fissures of rocks ! 

 This species bears at first sight a striking resemblance to the 

 common II, radicata. 



HYPOcnTEKTS sessilifloba, H. B. K. Chicla ! This in most 

 respects nearly approaches Achyroj)liorits Meyenianus^ Walp., 

 which must, I think, be united with the older species. 



Hypociijekis ? Above Casapalta ! This plant, which 



exactly agrees with No. 281 of Mandon's " Plants of Bolivia," is 

 allied to H, sessilifloray but can scarcely be united to that species. 

 The flowering heads are much smaller, and have not nearly so 

 many florets. 



HrPOCu^Eis TAKAXACorDEs = Oreophila taraxacoides, Meyen 

 et Wolf. Nov. Acta Acad. Leop. xix., Suppl. i. p. 291 = Achyro- 

 phorus taraxacoides, Tfedd. Chlor. And. Above Casapalta ! 



