140 



POACEAE 



7. Muhlenbergia californica Vasey. 



California Muhlenbergia. 



Fig. 304. 



Muhlenbergia glomcrata brevifolia Vasey, Bot. Gaz. 



1882. 

 Muhlenbergia sylvatica californica Vasey, Bot. Gaz. 



1882. 



92. 

 93. 



S3. 



Muhlenbergia californica Vasey, Bull. Torrey Club 13 



1886. 

 Muhlenbergia parishii Vasey, Bull. Torrey Club 13: 53. 1886. 



Perennial, the base more or less creeping and 



rhizomatous ; culms erect, somewhat woody below, 



smooth, puberulent about nodes, 30-60 cm. tall; 



sheaths scaberulous, keeled; ligule scarcely 1 mm. 



long; blades flat, 4-6 mm. wide, scabrous, usually 



short; panicles narrow, spikelike or interrupted, 7-15 



cm. long; glumes narrow, acuminate or awn-pointed, 



3-4 mm. long, scabrous on the keel; ; lemma about 



3 mm. long, scabrous, the callus hairs rather sparse, 



about half as long as the lemma; awn 2 mm. long 



or less. 



Borders of streams and irrigation ditches, confined to 

 southern California. Apr.-Aug. Type locality; San Bernar- 

 dino Mountains. 



8. Muhlenbergia foliosa ambigua 



(Torr.) Scribn. 

 Leafy Muhlenbergia. Fig. 305. 



Muhlenbergia ambigua Torr. in Nicoll. Rep. Miss. 164. 1843. 

 Muhlenbergia foliosa ambigua Scribn. Rhodora 9: 20. 1907. 



Perennial from creeping scaly rhizomes; culms 



erect, more or less branched above, minutely scabrous 



below the nodes, 60-100 cm. tall; sheaths smooth or 



slightly scabrous, keeled; blades 5-15 cm. long, 2-5 



mm. wide, scabrous, appressed ; panicles narrow, 10- 



15 cm. long, interrupted, spikelike, the branches 1-3 



cm. long, densely flowered ; glumes narrow, acuminate 



or aristate, about 3 mm. long; lemma a little shorter, 



bearing a slender awn about 5 mm. long. 



Moist soil. Arid Transition Zone; Washington (Spokane 

 County) and Oregon (Coos River, Harper Ranch) east to 

 Minnesota. August. Type locality: Minnesota. 



9. Muhlenbergia filiformis (Thurb. ) Rydb. 

 Slender Muhlenbergia. Fig. 306. 



I'ilfa depauperata filiformis Thurb. ; S. Wats, in King, Geol. 



Expl. 40th Par. 5: 376. 1871. 

 Vilfa gracillima Thurb. in S. Wats. Bot. Calif. 2: 268. 1880, 



not Muhlenbergia gracillima Torr. 1856. 

 SporobolHs filiformis Rydb. Contr. U. S. Nat. Herb. 3: 189. 



1895. 

 Muhlenbergia filiformis Rydb. Bull. Torrey Club 32: 600. 



1905. 



Perennial or sometimes apparently annual, rather 

 soft and lax, spreading from a cluster of librous roots 

 or with decumbent creeping, apparently perennial 

 bases; culms capillary, a few centimeters to as much 

 as 30 cm. tall, often depauperate ; blades flat, usually 

 less than 3 cm. long; panicles narrow, interrupted, 

 few-flowered, usually less than 3 cm. long; glumes 

 ovate. 1 mm. long ; lemma lanceolate, acute, mucronate, 

 2 mm. long, minutely pubescent, scaberulous at tip. 



Open woods and mountain meadows, Hudsonian Zone; 

 Washington to California, east to Colorado. July-Sept. Type 

 locality: Yosemite Valley. 



