68 SO Ul HERN CALIFORNIA ACADEMY OF SCIENCE^. 



high and 3 mm. thick; scales ovate, obtuse, about 2 mm, long, 

 brown with a green midvein ; stamens 2 ; bristles 4-6, obscurely 

 toothed, equalling the achene, or none ; achenes broadly obovoid 

 0.75 mm. high, black and shining, tubercle flat and disk-like. 



In wet sand San Bernardino ; 1293, 5276, 5277 Parish. Palm 

 Springs in the Colorado Desert ; 1160 Parish. A species of wide 

 distribution in tropical regions. 

 y" 2. Eleocharis palustris, E. & S. Syst. 2 :151. 



Perennial by horizontal rootstocks ; culms stout, terete, 

 striate, 3-15 dm. tall; basal sheaths brown, the uppermost very 

 obliquly truncate ; spikelets ovoid-cylindrical, acute 1 cm. long ; 

 scales ovate, obtuse or subacute, purple-brown, with green mid- 

 vein ; stamens 2-3 ; bristles 4, equalling the achene, or none ; 

 achenes ovoid-oblong, 2 mm. long, yellow-brown, smooth and 

 shining, tubercle triangular-conic, less than one-fourth as long 

 as the achene. 



Probably common in wet places in the Cismontane region, 

 but the only specimen seen was collected by myself, at San Ber- 

 nardino. Cosmopolitan. 



1/ Eleocharis palustris glaucescens, Gray, Man. ed.5, 558. 

 Britt. & Br. 111. Fl. 1 :252. 



Culms slender, 3-5 dm. tall; spikelets oblong, 5-10 mm. 

 long, acute ; upper sheaths horizontally truncate ; tubercle nar- 

 rower and more acute. 



In swamps and ditches and along streams ; probably com- 

 mon. Lake Surprise, 8,200 ft. alt., San Jacinto Mts. ; 2489 Hall. 

 San Bernardino Valley; 1185 Parish. Common throughout 

 J^forth America. 



** Styles j-cle ft ; stamens usually j ; plants perennial by hori- 

 zontal rootstocks except n. ^. 



■^-Uppermost sheaths i- toothed, with a fmre or less indurated ring 

 at the horizontally truncate summit ; tubercle not continuous with 

 the summit of the obscurely j-angled, turgid, achene. 



-^^Achenes having intermediate ribs and minute transverse ridges 



3. Eleocharis acicularis, E. & S. Syst. 2 :154. 



Culms tufted from filiform rootstocks, setaceous or fili- 

 form, 3-15 cm. tall ; spikelet narrowly oblong, or ovate, acute, 

 2-3 mm. long, acute, 3-9-flowered ; scales ovate-oblong, aeutish, 

 1 mm. long, pallid or greenish ; bristles 3-4, Aveak, exceeding the 

 achene, often none ; achenes pale, oblong-ovoid, 1 mm. long ; 

 tubercle conic, one-fourth the length of the achene. 



Banks of the Santa Ana river, near San Bernardino ; 1061 

 Parish. • An immature specimen collected at Los Angeles, by 

 Davidson, may belong here. Throughout North America. 



(To be continued.) 



