No. 56. 



CALAMAGROSTIS NEGLECTA (Uliih.) Gaertii. Fl. Wett. i. 94 (17!)!»); 

 Anindo nr//lfvta Elirli. lieitr. vi. \M (171)1). 



Plant j)er('iiiiial, tutted, from ;i strong rootstock. 



Culmx f rect, simple, nearly smooth, leafy nearly to the i)ani<-le, 1 to 2 feet tall. 



Leaves of the radical-tuft numerous, with open, smooth, chartaceous sheaths and 

 slender, involute, rather rigid, sluirp-jKnuted blades half as long as the eidm : leaves of 

 the culm 2 or .'5; sheaths striate, nearly smooth, close, half oi)eu at the throat, uearly 

 as long as the iuternodes; blades erect, iuvolute, 3 to G inches loug; ligule acute, 

 decurrent, 1 to '2 lines long. 



1 iijloresceiice an erect, closely-flowered, narrow, oblong panicle 2 to 4 inches long; 

 rays 4 toO, in semiverticillate clusters at each of the 7 to 10 nodes of the hispid axis, 

 triangular, hispid, erect or spreading, unequal, 1 inch long or less, subdivided and 

 spikelet-bearing beyond the middle. 



Spikriets turgid, 1.1 lines long, with 1 ])erfect tlower and a pilose rudiment; empty 

 glumes nearly ecjual, ovate, acute, slightly scabrous and hispid on the keels, obscurely 

 3 nerved, 1.^ lines long; floral glume broadly obhmg, erose-dentate at the truncate 

 apex, smooth, 4-uerved, 1 to 1;^ lines long; awn arising above the middle, l)arely ex- 

 ceeding the apex of the glume ; palet broadly oblong, obtuse, half as long as the glume ; 

 hairs of the callus and rudiment one-half to two-thirds as long as the floret. 



Plate LVI; a, spikelet; b, first empty glume; e, second empty glume; d. floret, 

 side view with the jialet aud rudiment brought out from the enveloping glume; e, 

 floral glume spread out, dorsal view. 



Oregon to Alaska and in northern Labrador. This form agree.s well with the 

 sjjecimeiis from Scandinavia, marked Arunilo stricta Timm., Cahimagrostis stricta 

 Ilartmann. aiul l>eyeuxia negleeta ^lith. The figure, however, represents a broader 

 panicled state than is usual. The name has been applied to a species from the high 

 interior plains, which is C. robusta Vasey. 



