308 MUSEO NACIONAL DE BUENOS AIRES. 



sis, lobulis utrimque 5-10 triaiígnlari-ovatis acutis subcalloso- 

 mucronatis, postice in petiolo plano lato (5-20 mm long. = 

 3-5 mm lat. ) pallidiore productis, supra convexulis impres- 

 so-iminervibus subtns concaviusculis subenervibus. Scapi e 

 centro rosularnm exsurgentes, centralis crassus nudus (40-50 

 mm long, = 10-1-1 mm diam. ) albescens glaber saepe solita- 

 rius, quandoque pluribus alus (3-10) brevissimis v. fere nnllis 

 gracilioribus (5-15 mm long. = 2,5-3 mm diam.) basi cinctns, 

 omnes monocepliali glaberrimi. Capitula scapi centralis máxi- 

 ma (30-60 mm diam.) scaporum lateralinm minora (10-15mm 

 diam.) hemispliaerica, involucro e bracteis 8-20 late ovatis 

 (5-8 mm long. = 5-6 mm lat.) integris acutiusculis v. subob- 

 tusis efformato, receptáculo con vexulo colliculoso laxeirregu- 

 lariterque fimbrillifero, floribus numerosissimis. Flores erecti 

 ex albo virescentes, ovariis turbinato-pentagonis (1,5 mm 

 long. = 0,75 mm diam.) ajoice dentibus 5 minutis acutiusculis 

 ornatis, corollis tenuiter ex obconico cylindraceis (3,5-4 mm 

 long. = 0,75-1 mm diam.) ápice acute 5-dentatis, staminibus 

 5 ad faucem v. parum infra tubi corollini insertis, stylis lon- 

 giusculis filiformibus exertis ápice non v. vix leniter incras- 

 satulis. Fructus adhuc ignoti. 



