STIPEAR PLATENSES 79 



Hab. Vulgata in campis siccioribus planis v. montuosis a Rio 

 Negro usquc ad Mendo.;a (nec non in Cali/ornla) aest 1870 — 18D0. 



Obs. Peronnis, caespitosula, caespitibus laxiusculis parvis v. 

 pusillis (50-200 mm alt. et diam.). 



Calnii solitarii v. pauci e quoque caespite, folia scmpcr longe 

 superantes graciles (150-450 mm alt. = 0,75-1 mm diam.) anguste 

 fistulosi, non v. vix subscabridi, laeves v. obsoletissime longitror- 

 sum striati, 2-3-nodi, nodis non incrassatis concoloribus glabris. 



Folia omnia isomorplia, virida v. pallescentia, limbis rectis fle- 

 xuosulis V. subcircinatis, setaceis v. juncoideis rigidis convolutis, 

 teretibus v. leniter compressulis (25-150 mm long. = 0,4-1 mm 

 diam.) extus glabris non carinatis, plus minusve scabris, non v. 

 tenuiter longitrorsum striatis, ventre (1-2,25 mm lat. aprt.) cine- 

 i\ascenti-pulverulentis scabris, 3-7-salcato- striatis, apice saepius 

 subbreviuscule attenuato-subulatis acutis, non v. plus minusve 

 pungentibus, vaginis adpressis pallidioribus laevibus non striatis, 

 quandoque glaberrimis, quandoque totis (rarius margine externo 

 et anulatim tantum ad junctionem limborum) pubescenti-villosis, ore 

 truncatis, auriculis subrectangulis semper densiuscule longe piloso- 

 barbatis (supremis saepe exceptis), ligulis inferis angustissime mar- 

 giniformibus subobsoletis, ceteris evolutis, superis ovatis v. lanceo- 

 latis, scariosulo-subhyalinis, integris v. vix denticulatis, glabris v. 

 ad latera pilosis. 



Inflorescentia anguste spicata (75-150 mm long.) depauperata 

 laxiuscula, primo erecta adpressa, deorsum vagina folii supremi 

 leniter ampliata vestita, dein exerta secunda patentiusculo-exha- 

 rata, rachi tenui glabra scabrida, ramis alternis, geminatis v. soli- 

 tariis, gracilibus scabris, supra medium paucipedicelligeris, pedicel- 

 lis capillaribus trigono-angulosis (3-10 mm long.) apice clavulato- 

 incrassatulis asperis. 



