No. 97. 

 ELVMUS ARENARIUS L. Sp. Tl. i. S3 (1753). 



Plant perennial, from a thick rootstock. 



Culm erpct. velvety-pubescent at the to]) or nearly smooth, rolmst, 2 to 3 feet tall. 



Learcs of the sterile shoots w if h loose sheaths and thick, involute blades 1 to 2 feet 

 lonji: leaves of the Milm usually 3; sheaths rather loose, striate, smooth or i)ubescent, 

 nearly closed at the throat, mostly shortei' than the iiiternodes; blades involute and 

 rigid toward the point, slightly scabrid above; ligule less than 1 line long. 



Iiifiort'Kcmcv a linear, erect, usually ligid s])ike 5 to 10 inches long, with 2 or 3 

 sessile, appressed spikelets at each of the 12 to 18 nodes. 



Spikelcta 3- to 5-tlowered, 9 to 12 inches long; empty glumes lance-ovate, acute or 

 siibulatepointcd, p)d)esc<'nt, indistinctly H-iierved, s<mie of the nerves very jirominent. 

 S to 11 lines long, the second 1 line longer than the tirst, each exceeding the adjacent 

 tlorets; floral glume lance-ovate, acute, smoothish to villous-pubescent, 7-nerved, 7 to 

 9 lines long; jialet oblong, bifid at the apex, ])ubescent on the keels, about e(|inding 

 the glumes, ovary [)ubcsceut; lodicules 2, lanceolate, ciliate on the margins, 2 lines 

 long. 



Plate XCVII; a, s]iikelet with florets lifted out of the empty glumes and 

 si)r«'ad out somewhat; b, floral glume, dorsal view; e, palet, ventral view; d, pistil 

 and lodicules. 



Oregon to Alaska, mostly near the coast, and on the Atlantic coast from Lal)rador 

 to Maine. This is evidently the same siiecies described as Elymns luiiUin Trin. in 

 Spreng. Neue KiAdeck. ii. 72 (1821). There is another and diflerent E. violHx, li. Br. 

 A]t]^. Frankl. .Tour. 7.32 (1823), which is i)robably the same as E. (I(is!/.stt((li!/s Trin. in 

 Ledeb. Fl. Alt. i. 119 (1829). 



