86 MEMOIRS OF THE NEW YORK BOTAXICAL GARDEN. 



Bessey, 381 1; East DeLacy's Creek, Aug. 10, JjSy; 1884, 

 Tzt'cedy, 220; Falls of Yellowstone, 1871, Hayden. 



*Carex festiv-a pachystachya (Cham.) Bailey, Mem. Torr. Bot. Club, 

 I : 51 ; Carex -pachystachya Cham. : Steud. PI. Cyp. 197. 

 Montana: Park Co., Tzi'cedy (ace. to Bailey). 



Carex festiva Dewey, var. 



The following specimens were designated thus by Professor Bailey. 

 They represent several forms of the festiva group, perhaps even 

 several distinct species. 



Montana: July 17, 1895, Rxdbcrg^ 2186: Spanish Basin, June 

 28 and July i, 1897, Rydherg ct- Bcsscy, 3/88, 3/8^; Spanish Basin, 

 1896, Rydberg, jojj ( ?) . 



Yellowstone Park: East DeLacy's Creek, Aug. 10, 1897, 

 Rydbcrg & Bessey, Jjgi : Yellowstone Lake, Aug. 12, j8io; 

 Upper Falls, Aug. 14, jySj. 



Idaho: Henry's Lake, July 31, 1897, Rvdberg- l(- Bessey, j/po, 

 3812. 



Carex athrostachya Olney, Proc. Am. Acad. 8 : 393 [Man. 



R. M. 396; Bot. Cal. 2: 234]. 



In meadows up to an altitude of an altitude of 2000 m. 



Montana: Bozeman, 1895, Shear, 433: Rydi)erg, 2216; Box 

 Elder Creek, 1886, R. S. Williams, 433: Flathead River, 1883, 

 Canby^348; Spanish Basin, 1896, Rydberg, 3041 , 3036. 



* Carex sychnocephala Carey, Am. Journ. Sci. II., 4: 24 [111. 



Fl. I : 360]. 



Prairies at an altitude of less than 1000 m. 



Montana: Great Falls, 1891, R. S. Williams, 414. 



ARACEAE. 



* Lysichiton Kamtschatcensis Schott, Prod. Aroid. 412 [Bot. Cal. 2 : 



187]. 



The only iVraceous plant of the region, somewhat resembling the 

 Skunk Cabbage of the East. Its leaves are oblong-lanceolate, 3-7 

 dm. long and 8-25 cm. wide ; the peduncle is very stout, with a 

 broad, acute spathe. It is confined to the portion of the State west 

 of the Rockies. 



Montana: Hudson Bay Creek, Flathead Lake, 1883, Canby, 



