MlCllJUAN ACAhKMY OF SCIENCE. .'Mil 



Typiciil /•;. rnijitiitl 1(1)1 T.. is now restricted to the Antic r(>^'i()iis. The 

 Michigan material is referred (o two varieties. /•;. rdt/iiidlinii var. Inonilr, 

 Turcz. (/*;. cuUiirix Cham.) Keweenaw county. August 21'. 1S87, No. 55, and 

 E. vaginatnm var. opacum Bjornstr. Lal^eville, Farwell and Billingtoii. .Tune 

 2, 1918, No. 4907. 



E. gracile Koch. Keweenaw county, August 22, 18S7, No. 551. 



E. gracile var. paucinervinm P^ngelni. Keweenaw county, August, 1901, 

 No. 1735. Neither form of the species is common. The variety has the blade 

 of the iippermost leaf longer than its sheath, while in the species it is shorter. 



E. pohjHtachion L. (E. an gusti folium Hoth.) Keweenaw county, Sep- 

 tember 10, 1888, No. 691. 



E. polystachion var. majus (Schnltz) As. & Greb. This variety is accred- 

 ited to Michigan in Gray's Manual. 



E. POLYSTACHION var. viRiDi-CARiNATUM (Engelm) n. comb. (E. latifolium 

 var. iHridi-carinatum Engelm. Am. Jour. Sci. XLVI, 103, 1844). Keweenaw 

 county, July 12, 1890, No. 743 ; Parkedale, June 2, 1912, No. 2614. 



Phaeocephalum Ehrh. (Triodon Pers. and Rynchospora Vahl) appears to 

 be the oldest name for the genus. The Michigan species are the following : 



P. ALBUM (L.) n. comb. (Schoenus albus L. Sp. PI. 44, 1753). Keweenaw 

 county, August 22, 1887, No. 552; Rochester, August, 1908, No. 552a; Marl 

 Lake, August 13, 1910, No. 4374. 



I'. ALBUM var. MARCUM (Clarke) n. comb. {Rynchospora alba var. macra 

 Clarke in Britt. Trans. N. Y. Acad. Sci. XI, 88, 1892). 



P. CAPiLLACEUM (Torr.) n. comb. (7?. capillarea Torry Comp. 41, 1826). 

 Orion, Aug. 29, 1895, No. 884 ; Marl Lake, Aug. 13, 1916, No. 4366 ; Parkedale, 

 July 14, 1912, No. 2858. 



P. CAPILLACEUM var. Icmsetum (E. J. Hill) n. comb. {R. capiUacea var. 

 Icoixeia E. J. Hill; Gray's Manual 201, 1908). Orion, Aug. 29, 1895, No. 911. 



P. (iLOMERATUM ( Ij. ) {Schoemis glomeratus L. Sp. PI. 44, 1753) var. 

 MINUS (Britt.) n. comb. (R. glomerata var. minor Britt. Trans. N. Y. Acad. 

 Sci. XI 89, 1892). The variety only is found in Michigan. Ypsilanti, Aug. 

 12, 1891, No. 1199; Detroit, July 27, 1893, No. 1199a; Keweenaw Co., Aug. 

 1904, No. 1199b ; Parkedale, July 28, 1912, No. 2919. 



P. CYMOSUM (Ell.) n. comb. {R. cymosa Ell. Sketch. I 58, 1816.) 



P. FuscuM (L.) n. comb {Schoenus fusciis L. Sp. PI. 1664, 1763). 



