54 



BULLETIN 772, TJ. S. DEPARTMENT OF AGRICULTURE. 



Type species: Dissant helium supiuuni Trin. 



Dissanthelium Trin., Linnsea 10: 305. 1836. One species described. 

 Stenochloa Nutt., Journ. Acad. Phita. II. 1: 189. 1848. One species described, 

 &. californica. 



Our Calif ornian species, Dissantheliwm calif omicum (Nutt.) 

 Benth. (fig. 21), is an annual with flat blades and a narrow somewhat 



open panicle. It is a rather 

 rare species found in 

 southern California and 

 the islands off the coast 

 and has no economic value. 

 The second species of 

 the genus is Dissanthelium 

 supinum Trin., a low 

 tufted perennial, with nar- 

 row, folded or convolute 

 blades and short, densely 

 flowered panicles. This is 

 found on alpine summits 

 in Mexico, Bolivia, and 

 Peru. It has been called 

 Deschampsia matthewsii 

 Ball and Dissanthelium 

 sclerochloides Fourn. 



15. REDFIELDIA Vasey. 



Spikelets compressed, 

 few-flowered, mostly 3 or 

 4 flowered, the rachilla 

 disarticulating above the 

 glumes and between the 

 florets; glumes somewhat 

 unequal, 1 -nerved, acumi- 

 nate; lemma chartaceous, 

 3-nerved, the nerves paral- 

 lel, densely villous at base ; 

 pa lea as long as the 

 lemma; grain free. 



A rather tall perennial, 

 with rhizomes and a large 

 panicle with diffuse capil- 

 lary branches. Species 



One 5 Sand hills f the 

 Great Plains. 



FIG. 21. 



flfaaantoe.Hum californium. Plant, X ft 

 spikelet and floret, X 5. 



Type species: Graphephorum flexuosum Thurb. 

 Redfieldia Vasey, Bull. Torrey Club 14: 133. 1887. 

 R. flexuosa (Thurb.) Vasey. 



One species described, 



