STATE GEOLOGIST. 151 



E. palustris, E. Br., var. glaucescens. Gray. Spike-Rush. 



Minneapolis, Kassube. 



E. conipressa, Sullivant. Spike-Rush. 



Blue Earth county, Leiherg. [Emmet county, Iowa (rare), Cratty.] South . 



E. intermedia, Schultes. Spike-Rush. 



Lapham. Blue Earth county, Leiberg. Probably throughout the state. 



E. tenuis, Schultes. Spike-rush, 



Lapham. Blue Earth county (frequent in peat-bogs), Leiberg. [Devil's lake, 

 Dakota, Geyer.} 



E. acicularis, R. Br. Spike-Rush. 

 Common throughout the state. 



E. Wolfii,* Gray. Wolf's Spike-Rush. 



Collected by Mr. B. I. Cratty on wet prairies in Emmet county, Iowa, adjoining the 

 south line of Martin and Jackson counties in Minnesota, where it may also be confi- 

 dently looked for ; determined by Mr. William Boott. 



E. pauciflora, Watson. (Scirpus pauciflorus, Lightfoot.) Spike-Rush. 

 Lake Superior and lake of. the Woods, Macoun. North. 



SCIRPUS, L. Bulrush or Club-Rush. 



S. caespitosus, L. Bulrush or Club-Rush. 



North and northwest of lake Superior, Macoun; doubtless in northern Minnesota. 



S. pung-ens, Vahl. Bulrush. 



Common throughout the state, excepting perhaps northeastward. 

 S. Torreyi, Olney. Torrey's Bulrush. 



Lapham. Infrequent. 

 S. lacustris, L. (S. validus, Vahl.) Great Bulrush. "Black Rush." 

 ["Tule" in California (S. laeustris, L., var. occidentalis, Watson).] 



Abundant throughout the state. "In common use among the Indians for making 

 mats." Parry. 



S. debilis, Pursh. Bulrush. 



Lapham. [Al so in the "Wisconsin catalogue, probably on Dr. Lapham's authority ; 

 and in Nebraska, Aughey.} 



[S. maritimus, L., was collected by Geyer at Devil's lake and on the Sheyenne and 

 James rivers, in Dakota. It will probably be found in the Ked river valley in Minnesota.] 



S. fluviatilis. Gray. River Club- Rush. 



Through the south half of the state, and in the Eed river valley. Minneapolis, 

 Roberts; Blue Earth county, Leiberg; Emmet county, Iowa (common), Cratty; Pembina, 

 Chickering, 



*Eleocharis Wolfii, Gray. Ehizomes very small, creeping, perennial, forming 

 small scattered tufts; culm a foot high, slender, pale-glaucescent, striate, two-edged, 

 one side flat, the other convex ; sheath obliquely truncate, hyaline above : spike ovate - 

 oblong, acute ; scales oblong-ovate, obtuse, scarious, pale purple ; style 3-parted ; 

 achenium pyriform, shining, having about 9 nearly equidistant obtuse i"ibs, with trans- 

 verse wrinkles between; tubercle small, depressed, truncate, more or less apiculate ; 

 bristles of the perigynium [always?] none.— [First known from Illinois.] The spike, as 

 to form and imbrication of the scales, is much as in E. tenuis and E. acicularis, etc. ; but 

 the achenium, with its several longitudinal ribs and delicate transverse lineation, is 

 upon the plan of E. acicularis. This renders the species a very peculiar and distinct 

 one. Gray, Proc. Amer. Acad., vol. x, p. 77, as translated by Arthur, Contributions to 

 the Flora of Iowa, No. VI. 



