O.J.S TWENTi-FlJi«T KKl'UItT. 



situations, but is much less common. Near Tpsilanti, July 31, 1891, No. 1189 ; 

 Detroit, July I'J, 1894, No. 1189a; Rochester, July 4, 1896, No. 1189b, and 

 September 28, 1911, No. 2956 ; Marl Lake, August 15, 1917, No. 4546. 



Trichophyllum Ehrh. has 21 years priority over Eleocharis R. Br. Pre- 

 sumably the reason Ehrhart's name has been neglected may be found in the 

 generally conceded preponderating weight of the influence inseparable from 

 the authority that goes with the name of Robert Brown, aided, no doubt, by 

 the ex -post facto laws passed by botanical congresses, the members of which 

 have had no Inclination to learn the many new names for old species that it 

 would be necessary to adopt in case the changes were made, always a sign of 

 retrogression, rather than of progression. The names of Michigan species not 

 .already transferred follow : 



T. iNTERSTiNCTUM (Vahl.) n. comb. {Scirpus ititerstinctus Vahl. Enum. 

 II 251, 1806). 



T. MUTATUM (L.) n. comb. {Scirpus niutatus L. Amoen. Acad. V. 391, 

 1760). 



T. RoBBiNsn (Oakes) n. comb. (Eleocharis Rohhinsii Oakes, Hovey's 

 Mag. VII, 178, 1841). 



T. oLiVACEUM (Torr.) n. comb. {Eleocharis olivacea Torr. Ann. Lye. N. 

 Y. Ill 300, 1836). 



T. OVATTJM (Roth) u. comb. {Scirpus ovatus Roth. Catal. Bot. I 5, 1797). 

 On the Keweenaw PeninsiUa, but scarce. August 22, 1887, No. 547. 



T. OBTUSUM (Willd.) n. comb. {Scirpus obtusus Willd. Enum. 76, 1809). 

 Very common throughout. Keweenaw county, August 22, 1887, No. 547a ; 

 Belle Isle, August 6, 1882, No. 547b; Royal Oak (Zoo Park), July 13, 1918, 

 No. 4320. 



T. PALusTRE var. GLAucESCENs (Willd.) n. comb. {Scirpus glaucescena 

 Willd. Enum. 76, 1809). Keweenaw county, July 25, 1890, No. 772; Ypsilantl, 

 June 21, 1892, No. 772a ; Detroit, July 10, 1892, No. 772b, and July 7, 1893. 

 No. 772c; Tacoma, July 2, 1916, No. 4270. A slender, filiform condition of 

 the species. 



T. PALUSTRE var. CALVUM (Torr.) n. comb. {Eleocharis calva Torr. Fl. 

 N. Y. II, 346, 1843). A low slender form without bristles. Gro.sse Pointe and 

 Belle Isle, July 21, 1906, No. 1988. 



T. PALUSTRE var. viGENS (Bailey) n. comb. {Eleocharis palustris var. 

 vif/eus Bailey, Journ. N. Y. Micros. Soc. V 104, 1889). A very stout and rigid 

 form of the species. Keweenaw county, July 25, 1890, No. 773. 



