III 



DESCRIPTION DE DEUX ESPÈCES NOUVELLES 



DU 



Genre HIERACIUM 



PAR 

 C. ARVET-TOUVET 



SuBGEN. STENOTHECA 



SeCt. AURELL^FORMÎA 



Hieracium bulbisetum Arv.-T. {Hier, frigidum Pringle 

 Plantœ Mexicanse (1894), n" 4715! non Weddel !!). — Phyllo- 

 podum, barkhausiforme, undique pilis basi lanceolato-bulbosis se- 

 tosum; caulis subscapiformis, 2-3 decim. altus, remote 1-3 phyllus, 

 apice furcato-oligocephalusvel fere a basi turcato-ramosus, pedun- 

 culis cum periclinio glanduloso-setosis (setis basiatris) et subcano- 

 tioccosis ; involucrum circiter centimetrale, seque latum ac longum, 

 subrotundo-ovoideum, squamis lanceolatis, acuminato-acutis exter- 

 nisve subobtusis; ligulae lutea3, involucrum excedentes et, pro 

 subgenere, sat elongatne; achenia columnaria, apice truncata, 

 basi subattenuata, matura subatra, pappo rufescenti-albido; folia 

 utrinque bulboso-setosa, subintegerrima vel + repando-subden- 

 tata; radicalia obovato-lanceolata vel lanceolata, apice obtuso 

 mucronata vel triangulari-subacuminata, inferne in petiolum 

 cuneato-attenuata; caulina 1-3 remota, decrescentia, versus basim 

 cuneato-subattenuata vel sessilia. 



