7 8 



PATAGONIAN EXPEDITIONS I BOTANY. 



joint much below the middle. Anthopodium scarcely half the length of 

 the flower. 



N. Patagon., at Pantanosa near Carmen. 



cent. 



O. TUBERCULATA (Desv. sub Piptochcetium] Speg. 



Glumes ovate, exceeding the flower, 5~3-nerved ; sometimes violas- 

 Flower hazel-colored to black, sublenticular, carinate, papillose- 

 verrucose. Crown none or scarcely umboniform. An- 

 thopodium small, short-pubescent. Awn excentric, 

 caducous, 4-5 times as long as the flower. Culms 

 equalling or even exceeding the filiform subglabrous 

 leaves. Panicle contracted-spiciform, often sheathed. 

 N. Patagon., in dry sandy places near Carmen. 



17. MUHLENBERGIA Schreber. 



Leaves flat or convolute ; panicle strict or lax. 

 Spikelets i- rarely 2-flowered. Glumes 3-4, the empty 

 glumes acute orawned, the flowering glume 3~5-nerved, 

 obtuse or acute or long-awned ; at length enclosing 

 the free grain. 



Species 60, chiefly American, a few Asiatic. (Brit. 

 & Br. i,'i42.) 



M. RARIFLORA Hook. f. (Stipa rariflora Benth.) 

 Rigid, glabrous ; the culm leafly, the leaves setace- 



ous, with involute margins. Panicle lax, few to 10- 

 flowered. Spikelets purplish. Glumes subequal, nerve- 



FIG. 32. 

 Muhlenbergia ran- 1-11 



flora, inflorescence and ^ ess ' slightly shorter than the flower. Floral glume 

 one spikeiet enlarged, lanceolate, coriaceous, glabrous at the base, ending in 



a very long rigid scabrous awn > and embracing the 

 shorter palea. (Fig. 32.) 



W. Patagon., Cape Tres Montes ; Staaten L; Fuegia; W. Magellan 

 (Dusen). 



1 8. PHLEUM Linn. Timothy-grass. 



Leaves flat. Panicle spike-like, cylindrical or ovoid. Spikelets i -flow- 

 ered. Glumes 3, i and 2 subequal, keeled and mucronate or awn-tipped. 



