92 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Mexico, rising in the mountains to 

 timber line. 



IS. Glyceria otisii Hitchc. (Fig. 

 104.) Culms about 1.25 m. tall; blades 

 flat, lax, 7 to 16 cm. long, 8 to 12 mm. 

 wide; panicle loosely pyramidal, to 18 

 cm. long, the branches few, drooping; 

 spikelets scarcely compressed, 5- to 

 6-flowered; glumes 1 and 1.5 mm. 

 long; lemmas broad, especially at the 

 summit, very scabrous, the prominent 



hyaline tip contrasting with the pur- 

 ple zone just below, the lower part 

 green. % — Timber, Jefferson 

 County, Wash. Known only from the 

 type collection. 



" 19. Glyceria pallida (Torr.) Trim 

 (Fig. 105.) Culms slender, lax, ascend- 

 ing from a decumbent rooting base, 30 

 to 100 cm. long; sheaths open, blades 

 mostly 4 to 8 mm. wide; panicle pale 

 green, open, 5 to 15 cm. long, the 



Figure 104. — Glyceria otisii. Panicle, X 1; floret, X 10. (Type.) 



Figure 105. — Glyceria pallida. Plant, X 1; floret, X 10. (Pearce, N. Y.) 



