No. 45. 

 DESCHAMPSIA CvESPITOSA Biauv. var, ARCTICA Vast-y. 



I'Idiit pcreuuial, dcnsi'ly ca'spitose. 



Culms erect, stout, smooth, 10 to l~> inches high. 



Liarcs of sterile shoots luiiuerous, witli rather loose, thin, overlaiipini; sheaths 

 and Hat or folded, erect blades 4 to inches long. Lea\es of the culm usually but one 

 above the base; sheath rather loose, striate, smooth, 4 to 5 inches long; blade tiat or 

 folded, slightly scabrid above, 1 to .'5 inches long: ligule thin, attenuate-pointed, 2 to 4 

 inches long. 



I nflorescmice a loose, pyramidal or oblong panicle 4 to 5 inches long; rays mostly 

 in threes or twos at the C> or 7 nodes of tlic slightly Hexuous, smooth, comiiioM axis, 

 scabrous, .; incites or less long, subdivided and spikelet -bearing beyond the middle. 



SpiJccIcts on pedicels about eciualiug themselves, slightly compressed, 2- to Ji-tlow- 

 ered, 3 to ."U lines long; emi)ty glumes lanceovate. minutely bidentate at the apex, 

 thin, scarious-margined, smooth, pnri)Ie turning brownish; tiist glume 1-nerved, I'i 

 lines long; second glume wider, slightly longer, 3-uerved; tioral glume oblong, erosely 

 4tootlied at the truncate apex, thin, obscurely 4-nerved, 2 to 2J lines long; awn at- 

 tachcfl near the l)ase, straight, about 2liiu's long; hairs of the callus \ as long as the 

 glume; intrenodes of the rachilla hairy, 1 line long, extended beyond the base of the 

 palet oblong, 2-lobcd at the apex, thin, 2-nervcd, 2 lines long; stamens .'5 with short 

 upper tloret; tilameiits. 



Plate XLV; (f, empty glumes; h, florets slightly opened. 

 t!oast of Alaska and adjacent islands. 



