MANUAL OF THE GRASSES OF THE UNITED STATES 



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Figure 567. — Muhlenbergia monticola. Plant, X 1; 

 glumes and floret, X 10. (Nealley 399, Tex.) 



to a delicate awn 2 to 3 cm. long. 

 % — Canyons, Texas, New Mexico, 

 and northern Mexico; Cuba. 



50. Muhlenbergia pungens Thurb. 

 (Fig. 569.) Perennial, with strong 

 creeping rhizomes; culms tufted, erect 

 from a decumbent leafy base, 20 to 

 40 cm. tall, sometimes taller; blades 

 short, involute, sharp-pointed; pan- 

 icle long-exserted, open, oblong, 5 

 to 15 cm. long; the main branches 

 3 to 5, these dividing into fascicles 

 of capillary finally spreading or di- 

 varicate very scabrous branchlets; 

 spikelets purple to brownish, 4 to 

 5 mm. long, the glumes about one- 

 third as long, scabrous, often erose 

 or toothed, the midnerve extending 

 into a short awn; lemma terete, 

 tapering into an awn about 1 mm. 

 long; palea about as long as the lem- 

 ma, the keels awn-tipped. 91 — 

 Dry hills and sandy plains, South 

 Dakota and Nebraska to Wyoming, 



Figure 568. — Muhlenbergia parviglumis. Panicle, X 1 ; 

 glumes and floret, X 10. (Vasey, Tex.) 



New Mexico, and Arizona. 



51. Muhlenbergia porteri Scribn. 

 Bush muhly. (Fig. 570.) Perennial; 

 culms woody or persistent at base, 

 numerous, wiry, widely spreading or 

 ascending through bushes, scaberu- 

 lous, mostly branching from all the 

 nodes, 30 to 100 cm. tall or more; 

 sheaths smooth, spreading away from 

 the branches, the prophylla con- 

 spicuous; blades mostly about 1 mm. 

 wide, flat, 2 to 8 cm. long, early 

 deciduous from the sheaths; panicle 

 5 to 10 cm. long, open, the slender 

 branches and branchlets brittle, wide- 

 ly spreading, bearing rather few 

 long-pediceled spikelets; glumes nar- 

 row, acuminate, slightly unequal, the 

 second about 2 mm. long; lemma 

 purple, acuminate, sparsely pubes- 

 cent, 3 to 4 mm. long, with a delicate 

 awn 5 to 12 mm. long. % — Dry 

 mesas and hills, canyons, and rocky 

 deserts, western Texas to Colorado, 



