STANDLEY — FLORA OF GLACIER PARK. 283 



3. Stipa nelsonii Scribn. Reported from Blackfoot Glacier. Alta. to Utah, 

 Colo., and Sask. — Closely related to S. viridula, on the average taller, with emooth,. 

 slightly broader blades, and slightly larger spikelets. 



5, ORYZOPSIS Michx. Mountain rice. 



1. Oryzopsis asperifolia Michx. Belton, in thin woods or on rocky slopes. B. C. 

 to N. Mex., Pa., and N. S.— Perennial with erect sterile shoots bearing elongate flat 

 rough blades 5 to 10 mm. wide, and nearly naked, inconspicuous, simple flowering 

 culms 20 to 30 cm. long, nearly prostrate on the ground; panicle narrow; spikelets 

 Ijlump, the awn about 12 mm. long, readily falling from the body of the floret. 



In habit the plants resemble species of Carex. 



6, MUHLENBERGIA Schreb. 



1. Muhlenbergia squarrosa (Trin.) Rydb. On prairie at east entrance, especially 

 in low alkaline places about ponds. Wash, to Calif., Colo., and Mont. — Plants tufted 

 and producing running rootstocks; culms 15 to 20 cm. tall, wiry, the blades short 

 and spreading; spikelets about 2.5 mm. long, the lemma tipped with a minute awn. 



7. PHLEUM L. 

 Perennials with simple erect culms, flat blades, and compact spikelike panicles. 



Panicles cylindric, mostly more than 5 cm. long; culms swollen at base. 



1. A. pratense. 

 Panicles ovate-cylindric, rarely over 3 cm. long; culms not swollen at base. 



2. A. alpinum. 



1. Phleum pratense L. Timothy. Common at low altitudes and in many places 

 abundant, in woods and on open slopes; often found high up along the trails. Native 

 of Eur.; cultivated and naturalized in N. Amer. — Culms 30 to 80 cm. tall; panicles 

 commonly 8 to 10 cm. long, 5 to 7 mm. thick. 



2. Phleum alpinum L. Mountain timothy. Common above timber line, in 

 meadows; sometimes in wet places at middle altitudes. Alaska to Calif., N. Mex., 

 N. H., and Lab.; also in Eur. and Asia. — Culms 15 to 30 cm. tall; panicles commonly 

 2.5 to 3 cm. long, 10 to 12 mm. thick in the middle. 



The most common grass of alpine meadows. 



8. ALOPECURTJS L. Marsh foxtail. 



Weak-stemmed perennials, growing in moist ground; culms simple; blades flat, 

 lax; panicle very dense; spikelets falling entire. 



Panicle 2 to 4 mm. thick 1. A. aristulatus. 



Panicle 7 to 9 mm. thick 2. A. alpinus. 



1. Alopecunis aristulatus Michx. Common at low altitudes, in boggy meadows 

 and about ponds. Alaska to Calif., Pa., and Me. — Plants commonly in tufts; culms 

 15 to 25 cm. long, decumbent at the base, the nodes geniculate; panicles pale and 

 shining; spikelets long-silky on the keel. 



2. Alopecurus alpinus J. E. Smith. Common on the east slope at low altitudes, 

 chiefly on prairie or moist open slopes. Alaska to Utah, Colo., Alta., and Lab.; also 

 in Eur. and Asia. {A. occidentalis Scribn. & Tweedy.) — Plants single or lew together; 

 culms 25 to 70 cm. tall, nearly erect; panicles gray or drab; spikelets long-silky all 

 over. 



