1889.] NEW-YORK MICROSCOPICAL SOCIETY. 103 



Var. GiGANTEA, Claike, MSS. Oregon, Lyall. 

 Var. Engelmanni (Steud). 



E. Engelmanni, Steud. Syn. 79 (1855) ; Gray in Patterson's 

 Cat. Oquawka Plants and Bot. Gaz. iii. 81 ; Watson, 

 Bot. Gal. ii. 222 ; Britton, Bull. Torr. Club, xv. 100. 

 E. obiusa, var. b, Torr. Ann. Lye. iii. 303 (1836). 

 Weathersfield, Conn., C. Wright ; hills in Waltham, Mass., B. 

 D. Greene ; Winchester, Mass., C. E. Faxon ; Pine Hill, Med- 

 ford, Mass., C. W. Swan ; Camden, N. J., Martindale ; King- 

 wood, Hunterdon Co., N. J., Best ; Washington, N. J., Britton ; 

 Ringing Rocks, Bucks Co., Penn., Ruth ; Tinicum, Delaware 

 Co., Penn., Porter ; Delaware, Canby ; Mississippi bottoms near 

 Oquawka, 111., Patterson ; Lafonte, Ind., E. J. Hill ; St. Louis, 

 Mo., Engelmann ; Little Rock, Ark., Coville ; Texas, Wright ; 

 California, Lemmon. 



After examining all the specimens of this interesting plant 

 that I could secure and having had the satisfaction of seeing it 

 growing, I find practically nothing but the elongated spike to 

 separate it from E. ovata, although some may consider this 

 sufficient. 



A monstrous form of what may be this species, having a capitate 

 cluster of spikes has been collected by Dr. C. W. Swan, at 

 Winter Pond, Winchester, Mass. 



(C) Palustres. 



13. E. PALUSTRis (L.), Roem. & Schultes, Syst. Veg. ii. 151 

 (1817). 

 Scirptis paliistris, L. Sp. PI. 70 (1753). 



Eleocharis uniglumis, Schultes, Mant. ii. 88 (1824); Torrey, 

 Ann. Lvc. iii. 301 (1836). 



Throughout North America. 



Flat-stemmed specimens of this species from Missouri and 

 Texas have been called E. compressa. They may represent a 

 distinct variety. 

 Var. GLAUCESCENS (Willd.), Gray, Man. 5th Ed. 558 (1867). 



Scirpus glaucescens, Willd. Enum. 76 (1809). 



Eleocharis glaucescens, Roem. & Schultes, Mant. ii, 89 



(1824). 

 Eleocharis calva, Torr. Fl. N. Y. ii. 346 (1843) ; a form 

 destitute of bristles. 



