PATAGONIAN EXPEDITIONS I BOTANY. 



minate ; leaf-blades convolute-setaceous, recurved, pungent. Panicle 

 oblong, purple-stramineous , pedicels rough ; empty glumes lance-acu- 

 minate, exceeding the flower ; floral glume 5-nerved, its apex lacerate ; 

 awned above the base ; with rudiment of a second flower and a long pilose 

 callus. 



N. Patagon. ; Catamarca. 



21. A. OLIGOCLADA Phil. 



Cespitose, 65 cm. tall. C^^lm naked at the top, smooth ; as are the 

 leaves. Panicle very lax ; 2 branches in each semiverticil. Glumes green 

 to violet, 4 mm. long ; floral glume half as long, awnless. 



W. Patagon. ; by Rio Palena. 



22. A. PATAGONICA Phil. 



Culm erect, 60-90 cm. tall, smooth, leafy to the top. Leaves rougli on 

 both sides, their sheaths glabrous ; ligules oblique, 4 mm. long. Panicle 

 20 cm. long, dense, cernuous ; rays 20 or more in the lower whorls, un- 

 equal ; pedicels capillary, rough, as long as the spikelets. Chimes nearly 

 3 mm. long, ovate-acute, ciliolate-carinate ; floral glume scarcely half as 

 long, ovate, 5-nerved, with a short terminal awn ; palea half as long as 

 the floral glume. 



N. Patagon. ; by Lago Nahuel-huapi. 



23. A. PAUCINODIS Hack. 



Cespitose, erect, geniculate, with i, rarely 2, nodes, both in the lowest 

 quarter of the 50 cm. culm, compressed, glabrous. Sheaths compressed, 

 all split, scaberulous upwards. Ligules 3-4 mm. long, truncate ; leaf- 

 blade 8-10 mm. by 4-5 mm., flat, glabrous, except on the edges and 

 upper surface. Panicle broad-ovate, lax ; the rachis scabrous upwards ; 

 rays whorled, the lower 7-10, unequal, undivided, and naked nearly half- 

 way up. Spikelets pallid. Glumes subequal, narrow-acuminate, seta- 

 ceous, keeled ; keel of second glume scabrid. Floral glumes broad-ovate, 

 half as long as the others, glabrous, entire, 5-nerved, obtuse, awned. 

 Callus minutely bearded. Palea smaller, oval-oblong. ^ 



Magellan. 



24. A. PROSTRATA Hook. f. 



Low, glabrous, creeping; culm 8-10 cm. tall, stoloniferous. Leaves 

 rather plane and smooth. Panicle linear-oblong ; floral glume truncate, 



