STIPEAK PLATENSES 



(51 



g/ E\ pratis prope Montecideo (J. Arechavaleta) et Jan. 1892 

 (C.S.). 



12. iPiiipa forinicarnm Del. 



Slipa formican/m Dcl., Incl . sem . 

 hort. monsp., p. 27 (1840). = P. Asch . 

 & P. Graehne, Syn . d. mittelcurop. fl., 

 bd. II, p. 112 (1899). 



Diag . GUmiae anguste lanceolatae , 

 flosculum sat superantes, 1-3-nerves, 

 hyalinae; flosculus sublanceolatus obso- 

 lete scabridus glaber; corona majuscula 

 subturbinatula ore obliqua dense ciUato- 

 flmbriata; anthopodium diametro flosculi 

 subduplo longius villosum; arista persi- 

 stens, flosculo 6-8- plo longior . Cuhvii elati graciles folia pla- 

 niuscula laevia sat superantes; panicula vaginata relaxata nutans. 



12. Stipa formicarum Del. 



a. Spioula '/i 



b. FIosculus '/i 



c. Flosoulus V, 



Hab. Non rara in pratis prope La Plaia, Dec. 1897, prope 

 Fortin Mercedes ad ripas Rio Coloi-ado, Jan . 1898, nec non in Sie- 

 rra Curdmaldl, Dec. 1899 (C. S.). 



Obs. Perennis densiuscule caespitosa, caespitibus mcdiocribus 

 (200-500 mm alt. = 100-250 mm diam.). 



Cnlmi folia aequantes v. superanles subgraciles (200-600 mm 

 aU. = l-2 mm diam.) toti vestiti, late flstulosi erecti glabri non 

 scabri laeves v. tenuissime longitrorsum striati , nodis calloso- 

 incrassatulis annulato-fuscescentibus glabris. 



Folia omnia isomorpha, herbaceo-rigidula v. subcoriaceUa pal- 

 lide viridi-glaucescentia, limbis in vivo aperto-planiusculis in sicco 



