MACLOSKIE: GRAMINE^E. 175 



15. S. POGONATHERA Desv. (S. ptilchella Munro.) 



Culm terete, rigid, whitish-pubescent, with glabrous nodes. Leaves 

 terete-convolute, hairy inside. Ligule oblong, pilose. Panicle 15-30 

 cm. long, sheathed at base, plumose-whitish. Empty glumes 3-nerved, 

 narrow, acuminate, the lower larger and twice as long as the flower. 

 Floral glume 8-9 mm. long, with awn 7 cm. long, bearded, recurved. 

 Palea pilose outside. Anthers 2. 



(Chili); S. Patagon. 



1 6. S. RARIFLORA (Hook. f. sub Muhlenbergia] Benth. 



Rigid, glabrous, 10-15 cm. high. Culm leafy; leaves much shorter 

 than culm, rigid, setaceous with involute margins. Panicle effuse, with 

 about 10 spikelets. Glumes subequal, nerveless, shorter than the flower. 

 Floral glume lanceolate, coriaceous, glabrous at base, violascent, ending 

 in a very long, rigid, rough awn, which embraces the short palea ; rachilla 

 bearded. Stamens 3. Ovary stiped, contracted above the middle. 



(S. Chili, Cape Tres Montes) ; W. Patagon.; Fuegia. 



Closely allied to S. verticillata from Australia and to Apera arundinacea 

 from New Zealand. (Benth.) 



17. S. SETIGERA Presl. (1836, non auct. Am. bor.). (S. neesiana 



O. Ktze. non Trin.) 



Glumes long-lanceolate, twice as long as the flower, 3-5-nerved, hyaline 

 or violascent. Flower terete, pale or fuscous, smooth, minutely papillose. 

 Crown obconical or cup-like, nude or ciliolate, constricted at base. Callus 

 2-3 times exceeding the floral diameter, villous. Awn persistent, 7-8 

 times as long as the flower, jointed near the middle, lower part twisted. 

 Culms 10-50 cm., surpassing the convolute-plane, partly hirtellous leaves, 

 retrorsely hirsute at the nodes. Panicle mostly depauperate, and lax- 

 nutant. 



N. Patagon., pampas about Rio Negro and northwards in Argentina. 



1 8. S. SPECIOSA Trin. & Rupr. (S. chrysophylla Desv. S. humilis 



speciosa O. Ktze.) 



Culms erect, tufted, 20-50 cm. high. Sheaths tawny, shorter than the 

 internodes; the upper one inflated. Lower ligule minute, fringed, the 

 upper 2 mm. long. Leaves of sterile shoots erect, scabrid, short ; leaves of 



