108 University of California Publications in Botany [VOL. 9 



This species is reported 50 from the southern Sierra, Mt. "Whitney 

 region, from an altitude of 3,000 m., but the specimen has not been 

 seen by me. 



2. Eleocharis Bolanderi Gray, Proc. Am. Acad., vol. 7, p. 392. 

 1868. 



Type locality. "Mariposa County, on banks of stream near 

 Clarks." (Yosemite.) 



Range. Sierra Nevada. 



Zone. Transition and above. 



Specimen examined. Sierra Nevada near snow at 9,500 feet, 

 Greene 448 ; the specimen is immature and is doubtfully referred. 





 2. SCIRPUS 



Spikelets solitary and terminal. 

 Involucral bract present. 



Bristles longer than the achene; culms naked 1. S. dementis 



Bristles shorter' than the achene; culms leafy 2. S. yosemitanus 



Involucral bract wanting 3. S. pauciflorus 



Spikelets numerous. 



Spikelets in a dense glomerule 4. S. criniger 



Spikelets in an open umbellate inflorescence 5. S. microcarpus 



1. Scirpus dementis Jones, Contr. W. Coast Bot., vol. 14, p. 21. 



1912. 



Type locality. "Rae Lake, King's River, California, alpine." 

 No specimen of this species has been seen ; it is here admitted only 



because, to judge from the description, it and the following species 



represent in our region 8. caespitosiis L. 



2. Scirpus yosemitanus sp. nov. 



Culmi dense caespitose, 6-10 cm. alti, gracile, tenue, valde striati. 

 Folium unicum culmo multo brevius, convolutum rigidum, iaeve 

 glaucescens. Spicula parvula (3-4-flora) unica terminalis bracteata. 

 Squamae oblongae valde obtusae vel subtruncatae, inferiores clarius 

 castatae sed non aristatae. Achenium obovatum cum apice conica. 

 Setae 3 ligulatae, planae achenio breviores. 



(Culms densely matted, 6-10 cm. high, with old sheathing leaf- 

 bases, slender, terete, very prominently striate, somewhat glaucous 

 and having a single blunt thick terete leaf, 23 cm. long at about the 

 middle. Spikelet small solitary and terminal, 3-4-flowered, subtended 

 by a bract about twice as long. Scales oblong, very blunt or squarrose, 

 the lower and outer very prominently ribbed but not awned. Achene 

 obovate, with a conical distal end surrounding the base of the style. 

 Bristles 3, ligulate, smooth, shorter than the achene.) 



Type from Tuolumne meadows, Yosemite National Park ; collected 

 by J. W. Congdon, August 8, 1898. 



