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



lanceolato-linearibus, acutiusculis, primum conglutinatis, 

 demura spiraliter revolutis. Anthera basi setis 2 simplicibus 

 munitae : appendiculd lineari-lanceolata acuta atro-violacea. 

 Stigma bifidura : laciniis semicylindricis, apice latiore, trun- 

 cato, minute papillose Achenia cuneato-oblonga, pilis rufis 

 hirsutissima. Pappus pilosus, fulvus : radiis creberrime den- 

 ticulatis, mucronulo simplici nudo apiculatis. 

 Obs. Planta Scorzonercc peruviana nomine a Ruizio inscripta. 

 Floret tempore pluviarum. Vulgo Escorzonero. Maxime 

 refrigerans et cordialis est : usus ejus communissimus est 

 in omni Regno Peruviano. Ruiz Mss. 



This genus is intimately allied to the preceding ; but its tuber- 

 culate receptacle, the consistence and greater uniformity of its 

 florets, and its involucrum composed of a double series of nearly 

 equal scales, appear to constitute a sufficient generic distinction. 

 Intimately allied to the last species is the Perdiciian squarrosum 

 of Vahl (Act. Havn. i. par. 2. p. 11. t. 6.), which is, however, 

 distinguished by its more slender habit; by the more numerous 

 and closely disposed segments of its leaves ; and lastly, by having 

 much fewer flowers on longer peduncles, disposed in a loose 

 spreading corymbus. 



b. Pappo Plumoso. 

 Leuceria. Lag. et Dec. 



Flosculi marginales radiati. Pappi radiis phimosis simplici serie 

 dispositis. Involucrum imbricatum. 



Involucrum semiglobosum, triplici circiter serie polyphyllum, 

 imbricatum. Receptaculum nudum, scrobiculatum. Flos- 

 culi plurimi, hermaphroditi, bilabiati ; in periphaeria ma- 

 jores ligula longiore patulo et hinc radium constituentibus ; 

 labio exteriore ligulato, 4-nervio, tridentato ; interiore pro- 

 fundi bipartito : segmentis lineari-angustissimis, obtusius- 



culis, 



