MACLOSKIE : GRAMINE/E. I J I 



dark-colored, smooth nodes, often exceeding the convolute, glabrous 

 leaves. Panicle contracted, with few spikelets, when young sheathed, at 

 length naked. 



Patagon., by Golfo de San Jorgo. 



2. S. CAUDATA Trin. 



Panicle contracted, its rays about 5, some of them floriferous not far 

 above the base, others higher up. Culms stout, 40-90 cm. Leaves seta- 

 ceous to rush-like. Glumes subequal, lanceolate, 5-6 mm. long, 3-nerved, 

 generally one of them with an apical tail. Floral-glume exceeding 4 mm., 

 pilose and with short apical setulae. Awn persisting, flexuous or jointed 

 at center, 12-16 mm. long, with a quasi-pappus at its base. Palea 

 shorter, 2-nerved. Anthers very short, bearded. 



Chili and near Bahia Blanca; a specimen from N. Patagon. "differs 

 only in the awns being somewhat shorter." (J. Ball.) 



3. S. CLARAZI Ball. 



60-90 cm. tall with filiform radical and broad cauline leaves from 

 inflated sheaths. Panicles lax, 25-50 mm. long. Glumes comparatively 

 large, to 3 cm., the floral glume acuminate, its hairs silky, its awn 5-7 cm. 

 long, scabrous, with a subcylindrical crown surrounded by a short ciliolate 

 pappus. Callus villous, as long as 3-4 breadths of the flower, which is 

 subtetragonal, villous on the angles. 



N. Patagon., over all the pampas and hills. 



4. S. FILICULMIS Del., 1894. (S. ceresiensis O. Ktze., 1898.) 



Glumes linear-lanceolate, twice or more as long as the flower, hyaline, 

 3-nerved. Flower subfusoid, glabrous, or obsoletely rough. Crown 

 none, but articulation of awn with glumella smooth or ciliolate. Callus 

 2-3 times as long as the floral diameter. Awn persisting, long, jointed 

 in lower part. Leaves capillary-setaceous; culms 20-85 cm - at fi rst 

 shorter, afterwards longer, filiform. Panicle linear, depauperate. 



Patagon., Argent, through all the pampas, from Chubut northwards. 



5- S. FORMICARUM Del. 



Cespitose, glabrous, perennial, 20-50 cm. high ; culms leafy, erect, with 

 thickish nodes. Leaves plane when fresh, about 25 cm. long, acute, not 

 pungent. Panicle vaginate, relaxed, nutant. Glumes narrow-lanceolate, 



