MACLOSKIE: GRAMINE/E. 187 



(Atacama) ; N. Patagon., in dry stony places nearColu-huapi. "Glumes 

 always conspicuously shorter than the flower." (Speg.) 



ii. A. EXARATA Trin. 



Culms erect, 30-60 cm. tall. Leaves mostly erect. Panicle narrow, 

 crowded, greenish, the rays floriferous from the base ; spikelets 3-4 mm. 

 long ; glumes subequal, acute, the floral glume shorter, sometimes awned 

 above the middle ; palea shorter or none. 



(W. of N. Am., Brit. & Br. i, 160.) 



A. EXARATA ANGUSTIFOLIA Hackel. 



Leaves of innovations very narrow, scarcely i mm. broad ; often con- 

 volute ; those of the culm broader. Culm 15 cm. tall. 

 East Fuegia (Dusen). 



12. A. EXASPERATA Trin. 



Culm simple, 45 cm.?, scabrous upwards; nodes and sheaths glabrous; 

 ligule sublinear, obtuse. Leaves plane, 5-10 cm. long, 2-3 mm. broad, 

 roughish on edge. Panicles spreading, 7-10 cm., lucidulous, with several 

 semi-whorls of rays, the shorter floriferous from the base, the longer up- 

 wards. Spikelets pallidly virescent. Glumes subequal, linear, hispidulous. 

 Floriglume half as long as the empty glumes, glabrous, with shortly den- 

 ticulate apex, bearing an erect seta which exceeds the glume. Palea one 

 third as large. Callus hairless ; rudiment none. 



(Chili) ; Patagon., elevated meadows near Carren-leofu. 



13. A. FLAVIDULA Steud. 



Culms erect, 20 cm. tall ; leaf-sheaths striate ; ligules exserted, hyaline. 

 Panicle contracted, 5-7 cm. long ; rays semi-whorled, naked at base, 

 divided upwards. Spikelets straw-yellow, linear, small ; glumes subequal, 

 ovate-lanceolate, acute, slightly keeled, exceeding the flower ; floral glume 

 slightly 3-toothed, enclosing the smooth oblong grain ; palea none. 



Magellan ; Fuegia, Ushuaia. 



14. A. FUEGIANA Hack. 



Cespitose, perennial, with extravaginal innovations. Culms erect, to 

 60 cm. tall, glabrous, binodal, naked upwards. Leaves glabrous, their 

 sheaths shorter than the internodes ; ligules ovate, acutish ; blade linear, 



