36 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Calamagrostis laxiflora Kearne} , Bull. U. S. Dept. Agric. Div. 

 Acrrost. 11: 34: Calamagrostis ncglccta gracilis Scribner, Bot. 

 Gaz. II : 175 ; not C. gracilis Seenus. 



Differs from C. hyperborea in the open panicle, the weak stem, 

 the almost filiform, not rigid, leaves and the less cespitose habit, and 

 from the next in the open panicle and the longer callus hairs. A 

 rare plant growing at an altitude of about 2000 m. 



Yellowstone Park : East Fork, 1885, Tzuccdy, ^82. 



* Calamagrostis neglecta (Ehrh. ) Gaertn. Fl. Wettenau i : 94 ; Ar- 



nudo ncglccta Ehrh. Beitr. 6: 137 [Kearne}^ Bull. U. S. Dept. 



Agric. Div. Agrost. 11 : 34; 111. Fl. i: 165]. 



It is distinguished from C hvpcrborca by the same characters as 

 the preceding, except that the panicle is not open, as in S. la.xijfora. 

 It is rare in Montana. 



Montana: 1883, Scribner, ^61 . 



Calamagrostis hyperborea Lange, Fl. Dan. 50: //. j ; Consp. FL 



Groenl. 160 [Kearney, Bull. U. S. Dept. Agric. Div. Agrost. 



II : 39] ; Calamagrostis robusta Vasey, Cont. U. S. Nat. Herb. 



3: 82; not Muhl. ; Deyctixia stricta Thurber, Bot. Cal. 2: 281 



[Man, R. M. 414 in part]. 



It is a very variable species with stiff culm and leaves and of more 

 or less cespitose habit. It grows along rivers, in sloughs, etc. It 

 belongs really rather to the river bottoms of the Great Plains, but 

 extends in the valleys of the mountain regions to an altitude of 2000 

 m. Mr. Kearney, in the bulletin referred to above, distinguished the 

 following varieties : for the limitations of these varieties that work 

 may be consulted. 



Montana: Deep Creek, 1883, Scribner, 3591 Fort Logan, 

 j6^a; 1886, Tweedy, 1020; Townsend, 1895, S/iccr, jgj, jgS and 

 406; Rydbcrg, 2IS4' 



Yellowstone Park: East Fork, 1885, Tzrcedy, jSj ; 1888, 

 ICnoTvlton. 



* Calamagrostis hyperborea stenodes Kearney, Bull. U. S. Dept. 



Agric. Div. Agrost. 11 : 39. 



Montana: Lima, iS(^^, Rydbcrg, 2ji8 and 2J19; East Gallatin 

 Swamps, 1896, Rydbcrg, Jidg; Flodnian, jj ,• 1889, F. W. Ander- 

 son. 



