140 MUSEO NACIONAL DE BUENOS AIEES. 



losis, foUis parvis menibranaceis v. siibcrassiusculis eximie 

 hastato-trüobis lohis ómnibus elongatis acutis, florilms racemu- 

 losis, calycis laciniis viridíbiis temiihus obhisis retusis 7ion 

 carinatis prÍ7no fructutn claiidentibus dein zt ve stellato-paten- 

 tibuSjSeminibuslenticularibus acute carinato-marginatis tenuis- 

 sime reticulatis nigris nitentihtis. 



Hcih. Sat rariim liinc inde secus Rio Chubutj Xov. 1899 

 (N. Illin), secus Eio Chico, Mrt. 1900 (C. A.), nec non in An- 

 dibiis Mendozinis, Mrt. 1901 (C. S.). 



Ohs. Radix recta simjílex (5-25 cm long. = 0,5-2 mm crass.) 

 parcissime barbato-ramosula albescens. Caules a basi laxe v. 

 densiuscule fastigiato-ramosi, erecti (20-200 mm alt. = 0,5-2 

 mm crass.) e terete obtuse angulosi pallide virides v. sublu- 

 tescentes, non v. obsolete longitrorsum striati, saepius pa- 

 pillis minutissimis hinc inde seriatis cailosis subepidermicis 

 \Aus minusve persj)icuis ornati, late medullosi, ramis arcuato- 

 adscendentibus in parte infera saepius nudis et simplicibus 

 sursum laxe adscendenti-ramulosis ac foliatis. Folia alterna 

 tenuia v. subcrassiuscula in prima juventute papuloso -fari- 

 nosa mox glabrata viridia limbis eximie liastato-triangulari- 

 bus, acutis (5-15mmlong. =r 4-12 mmlat.) angulis lateralibus 

 quandoque brevissimis quandoque in lobis fere linearibus 

 acutis patentissimis ferc cruciatis, quandoque arcuato-adscen- 

 clentibus integris v. e latere externo sub ápice minute 1 - den- 

 tatis, petiolis gracilibus dimidio brevioribus suffulta. Flores' 

 minuti in racemulis simplicibus v. subcompositis coiígesti ses- 

 siles primo grosse papuloso -farinosi dein glabrati, perigonio 

 5-fido, lobis obtusissimis v. subbilobo-emarginatis tenuibus 

 non carinatis post anthesin parum accrescentibus, sub fructu 

 in sicco subclausi in vivo v. uventibus stellato-patentibus, 

 utriculis depresso-lenticularibus tenui-membranaceis semine 

 zt ve subadnatis. Semina semper horizontalia mediocria v. 

 majuscula lenticularia, nigra nitentissima, laevia v. sub lente 

 validissima obsolete reticulata, margine acute carinata. 



Species statura et saepe liabitu sat variabilis et formae se- 

 <5[uentes f acile distinguendae : 



aj pusiUa: caulibus parvulis (20-50 mm alt.) subobsolete 

 papillosis, foliis cruciato-trilobis apicibus acutis, calycibus 

 fructiferis parvis (apertis 2 mm diam.), seminibus parvis (1 

 mm diam.). In aridis secus Rio Chubut. 



h) megcdosperma: caulibus gracilibus elatiusculis (10-15 



