AND THE ADJOINING TERBITORY. 237 



this should be named Chrysopogon nutans, the latter being the 

 trivial name given by Linnaeus ; but it seems undesirable to add 

 to the present synonymy. 



Alopecurus geniculates, L., var. aristvlatus, =A. aristu- 

 latus, Michx. Valley of the Bio Negro and elsewhere, in moist 

 situations (No. 198, G. C). Commonly called Gramilla de 

 banado. 



Aeistida sktifolia, H. JB. K. Bahia Blanca (No. 30, G. C). 



Stipa intermedia, Trin. Bahia Blanca (No. 20, G. C.). 

 Exactly agrees with a specimen collected by Darwin near Bahia 

 Blanca, and named by Munro. 



Stipa ricolor, Vahl. Bahia Blanca (No. 22, G. C). 



Stipa caudata, Trin. Bahia Blanca and elsewhere, common 

 on the plateaux (No. 19, G. C). A specimen collected by 

 Tweedie from the " plains of Patagonia," and named by Munro, 

 differs only in the awns being somewhat shorter. 



Stipa pulciiella, Munro MSS. Bahia Blanca and North 

 Patagonia (No. -25, G. C). This is scarcely different from S. 

 pogonathera, Desv. 



Stipa Clarazii, n. sp. Bahia Blanca (No. 21, G. C). This 

 appears to be well distinguished from all the described species, 

 and deserves to bear the name of its discoverer. I subjoin a brief 

 description : — ■ 



Stipa Clarazii. Perennis, culmis 2-3-pedalibus ; foliis radi- 

 calibus filiformibus, involutis, flexuosis, vix rigidis, caulinis ex 

 vagina ampla subinflata latiusculis, apicem versus involutis, basin 

 versus margine subscariosis, eximie striatis ; panieuhe laxae ramis 

 1-2-pollicaribus ; glumis pro grege maximis, ferepollicem longis, 

 superiore paullo longiore apice acuminata ; glumae fertilis pibs 

 albis sericeis, arista elougata 2-3-pollicari, scabro-villosa. 



Polypogon monspeliensis, L. Very common in the province 

 of Buenos Ayres, about Bahia Blanca, in the valley of the Eio 

 Negro, and elsewhere (Nos. 12, 172, and 230, G. C.). 



Pappopiiorum alopecuroides, Vahl, var. ? Bahia Blauca 

 (No. 74, G. C). In Kew Herbarium several specimens, seemingly 

 widely diftereut, have been placed in the same cover by General 

 Munro. Some are tall grasses, with a much-branched and well- 



