MICHIGAN ACADEMY OF SCIENCE. 350 



T. E.\c;ki,ma.\.\i (Stued.) n. comb. (Klcochuria Kiijjcttuitiuti Stuod. Syii. 

 ri. Cyp. 7!), lS5r>). Detroit, October 2, 1900, No. 1696. 



T. AOicuLARE (L.) n. comb. (Scirpux aoiculurLs L. Sp. PI. 48, 1753). 

 Keweenaw county, September 6, 1888, No. 676; Belle Isle, Aus^ist 6. 1892, 

 No. 676a ; Orion, August 29, 1895, No. 676b; Ypsilanti, July 31, 1891, No. 670c; 

 Lake Linden, August 24, 1812, No. 3081 ; Taconui, July 2, 1916, No. 4268. 



T. TENUIS (Willd.) n. comb. (Sairpus tenuis Willd. Enum. 76, 1809). 

 Keweenaw coiuity, August 18, 1890, No. 548a. 



T. ACUMINATUM (Muhl.) n. comb. (Scirptts acuminatus Muhl. Gram. 27, 

 1817). Keweenaw comity, August 22, 1887, No. 548. 



T. iNTERMEDiu.M (Mulil.) u. couib. (Scirpus intermedius Muhl. Gram. 

 31, 1817). 



Ibia castanka (Mx.) n. comb. {IScirpus castaueus Mx. Fl. Bor. Amer. 

 1,31,1803). 



Tria Autumnalis (L.) O. K. var. geminata (Lestib. & Nees) n. comb. 

 {Trichclonti/lis geminata Lestib. & Nees, ¥1. Bras. II pt. 1, pp. 79 and 80, 

 1842). Iria Richard has a year'.s priority over Fimbristylis Vahl ; Otto Kunze 

 took up the name, but changed the spelling to Iriha. The old F. autuminalis 

 (L.) R. and S., lias been split and that part of the species retaining the old 

 name is of southern range. That part of the species extending further north 

 has been known as F. geminata (Lestib. & Nees) Kunth or F. Frankii Steud. 

 The characters used to distinguish the two forms are so slight that it seems 

 better to retain them as variations of the same species. The Michigan plant, 

 presumably, is of the variety geminata, as its range is too far north for it 

 to be likely that it should belong to the typical form of the species. I haven't 

 seen it. 



Scirpus lacustrL'i L. has been restricted to the Old World. The American 

 plant is mostly the f!. I'aUdus Vahl. Keweenaw county, September 6, 1888, 

 No. 677; Ypsilanti, June 23, 1891, No. 677a; Detroit, August 6, 1892, No. 677b, 

 and July 18, 1912, No. 2874; Parkedale, August 4, 1912, No. 2994; Grosse Isle, 

 August 20, 1916, No. 4387 : Tacoma, September 23, 1917, No. 4624. 



S. occidentaUs (Watson) Chase. Keweenaw county, August, 1904, No. 

 1834 ; Parkedale, July 28, 1912, No. 2918 ; Marl Lake, August 13, 1916, No. 4377. 



8. occidentaUs var. congestus, O. A. F. Marl Lake, July 9, 1916, No. 

 4294, and August 13, 1916, No. 4376. 



aS'. Iieterochaetns Chase. Another .segregate of the old S. lacustris L., 

 which is said to oicur in Michigan. 



