POACEAE. 



uVri£ inTfce Blue Mountains at 1700 meters altitude. 



m ctrnuum Trin. Sterna 60-100 cm. tall, erect, the nodes pale; 



I, ,f bh«E. flat merely scabrous, IS 20 cm. long 6- mm wide; panicle 



• 5 cm lone 1<SS nodding; branchea in distant whorls, capillary, cernuous 



i lr " i. ,«:,,. .vtlu- middie; apikeleta 2-4-flowered, 6-7 mm. long without 



In, awn: lemma 3 4 mm. long, bearing an awn about twice its length. Moist 



Trisetum canescens Buckl. Much like T. cernuum the leaf blades and 

 ShVpubeacent; nodea usually dark; panicle erect, 7-16 cm. long; lemma 

 In coniferoua woods. 



50. SPHENOPHOLIS. 



Panicles contracted; spikelets 2-flowered; the rachilla extend- 

 ing beyond the Bowers; glumes shorter than the spikelet; the 

 lower linear, acute. 1 -nerved; the uppei much broader, 3-nerved, 

 obtuse or rounded at the apex, or sometimes acute, the margins 

 lemmas narrower, generally obtuse, 1-3-nerved,^ awn- 

 palea narrow, 2-nerved; grain free, loosely enclosed in the 

 Je and palea. 



Pans k dense, ered ; lemma obtuse. S. obtusata. 



■ -, usually nodding; lemma acutish. o. pallens. 



Sphenopholis obtusata lobata (Trin.) Scribn. Somewhat tufted, perennial, 



100 « m. tall, tin stems smooth; leaf blades flat, scabrous, 10-15 cm. long, 



; mm. wide; panicle erect, narrow, 5-12 cm. long, pale green, the branches 



rt an<l densely flowered; lemma narrowly obovate, obtuse. Rather rare, 



<>n s.mily bars of Snake River. 



Sphenopholis pallens major (Torr.) Scribn. Stems 30-90 cm. tall, gla- 

 leai black »6 15 <-m. long; panicle slender, 8-15 cm. long, usually loose 

 ! nodding, the branches 3-7 cm. long; spikelets about 3 cm. long, usually 

 nur emma narrow, acutish. Infrequent. 



51. KOELERIA. 



Tufted perennial grassts with narrow leaves and densely 



flowered spike-like panicles; spikalets 2-4-flowered ; rachilla 



articulated between the lemmas; glumes acute, subequal, keeled, 



• in the margins; lemmas 3-nerved, keeled, acute; palea 



rain free, enclosed in the lemma and palea. 



leria cristata I. i Pen. Perennial, the erect stems densely tufted, 

 70 mi. tall, usually glabrous; leaves narrow, commonly involute; panicle 

 nish or purplish, shining, 5-15 cm. long, often more or less inter- 

 ru| 5 mm. long, 2-4-flowered. Common on dry hillsides. 



52. ERAGROSTIS. 



nual or perennial grasses; inflorescence a contracted or 

 pikelets many-flowered, more or less flattened; 



