66 



BOTANICAL GAZETTE 



[JULY 



STIPA HASSEI NOT A GOOD SPECIES. 



(with one figure) 



In Contributions from the National Herbarium i : 267. 1893, Dr. 

 Vasey describes several new species of grasses. One of these belongs 

 to the genus Stipa and is named Stipa Hassei in honor of its collector. 



There are five specimens of this species in the 

 National Herbarium, all collected by Dr. Hasse in 

 the region of the Santa Monica range of Los 

 ^ Angeles county, California. The type and a cotype 

 were collected in the spring of 1891, and the other 

 specimens were collected April 5, 1895. 



All these specimens are but abnormal forms of 

 Stipa eminens Andersoni Vasey, caused by the growth 

 of a smut. The oblong grain, thin glumes, and 

 narrow, short-branched panicles, on which the 

 specific characters of Stipa Hassei YdiSty are based, 



a 



6 



are due to the development of this fungus. 



In the accompanying figure, a shows a spikelet from the type 

 specimen of Stipa Hassei Vasey, and b a spikelet from the type speci- 

 men of Stipa eminens Andersoni Vasey. Both are enlarged twice. 

 Ernest Norton Wilcox, Office of the Agrostologist^ Washington, D, C. 



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