STIPEAE PLATENSES 165 



inni long.) dorso convexulu ventre applanato-subcaniculata purpu- 

 rascente non scabra, partu sulj genu laxissime torta in dimidio an- 

 tico nuda complanatula, in dimidio postico villis albis (4-5 mm 

 long.) tenuibus pappose-vestita. 



51. I§ti|»a |>sittacoi'iim Speg., n. sp. 



Diag. Microstipa; glumae anguste lanceolatae, tlosculo duplo et 

 ultra longiores, 1-3-nerves, hyalinae; tlosculus lineari-fusoidcus, gla- 

 beri'imus sed in linea dorsali ultra medium longe villosus, laevissi- 

 mus; corona parum perspicua pallescenti-callosa cum glumella 

 plane continua, acie longiuscule ciliato-villosa; anthopodium dia- 

 metrum HoscuU leniter superans; arista subcaduca. Cuhni elati ro- 

 busti folia e plano convoluta crassa rigida juncoidea laevia longe 

 superantes; panicula ampla laxa erecta v. exarato-patens. 



Species inter St. paramillocnsem Speg. et sequentes (n. 54 cla- 

 vis dichotomicae) inserenda. 



Hab. Abunde in praeruptis collinis Arroyos de los papagallos 

 prope Mendo^a, Febr. 1901 (C. S.). 



Obs. Perennis, laxe caespitosa, caespitibus rigidis virescenti-fla- 

 vescentibus. 



Culmi ex quoque caespite numerosi folia longe superantes (250- 

 1200 mm alt. = l-2,5 mm diam.), in quarto inflmo +ve dense al- 

 terne v. subdistiche foliosi, in reliqua parte supera nudi v. reniote 

 1-3-foliati, flstulosi, ab ima basi recti erecti simplicesque glaberri- 

 mi laeves e virescenti flavescentes, nodis nudis saepius 1-3, glabris 

 supra subtusque leniter coarctatulis atque pallide subrufescentibus 

 V. fuscescentibus. 



