HORDE.E. 649 



1. E. arenarius L. Sp. PI. 83 (1753). Raucheria Grass. 

 Culms stout, glaucous, 1-2 in. or more high, from creejDing 



rootstocks. Sheatlis smooth, ligule very short; blades strict, pun- 

 gent, 30 cm. long, 10-15 mm. wide, the upper short. Spike dense, 

 strict, 15-30 cm. long, 1.5 cm. broad; rachis hirsute. Spikelets 

 2-3 at a joint, 2-3 cm. long, appressed, pubescent, mostly 3-flowered; 

 empty glumes linear-lanceolate, 3-5-nerved; floral glume rigid, 

 ciliate, keeled toward the cuspidate apex ; palea as long as its glume. 



It considerably resembles E. mollis. 



Alaska, Ftmston for Nat. Herb. 140; Washington, Iloiuell, 

 Suksdorf 1028. 



Sandy seashores, Alaska to California, also in Europe and 

 northern Asia. 



2. E. mollis Trin. Spreng. N. Endt. 2 : 72 (1821). 



Culms stout, 80-170 cm. high. Leaves much like those of 

 E. arenarius. Spike erect, 20-30 cm. long. Spikelets 2-3 at 

 each joint, 2-3 cm. long, 5-8-flowered, more or less soft-j^ubescent. 

 Empty glumes as long as the sj)ikelets, 5-7-nerved; floral glume 

 15-20 mm. long, 7-nerved. 



This is much like E. areyiarins. The leaves and spikes are 

 softer, the empty glumes more ciliate and broader and often 

 7-nerved. . 



Maine (Eastport), Beal 162; Isle of Shoals, Cauly. 



3. E. dasystachys Trin. Ledeb. Fl. Alt. 1 : 120 (1829). E. 

 Vancouverensis Vasey, Bull. Torr. Club, 15:48 (1888). 



Culms smooth, rather stout, 60-80 cm. high from creeping 

 rootstocks. Leaves scabrous throughout, or the sheaths smooth; 

 ligule very short; blades rigid, more or less involute, pungent- 

 pointed, 20-35 cm. long, 5-8 mm. wide. Spike strict, 8-12 cm. 

 long. Spikelets 2 at each joint, 15-20 mm. long, closely imbri- 

 cate, 4-7-flowered; empty glumes equal, 13-15 mm. long, more or 

 less ciliate, sliort-awned, narrowly-lanceolate, 3-nerved; floral glume 

 slightly ciliate, the lower one 12 mm. long, besides the short awn. 



Montana, Williams; Vancouver Island, Macoun; Washington, 

 Jlotvell. 



Alaska to Washington, 



