100 ERYTHEA. 



slender, divergent scabrous awn 3.5 to 4 cm. long; palet as 

 long as the flowering glume and its teeth, scabrous on the 

 nerves, obtuse; joints of the rachis 4 to 6 mm. long, flattened, 

 linear, very slightly clavate thickened and scabrid near the apex. 

 In sandy soil, Wawawai, Wash., 17 June, 1899, C. V. Piper, 

 No. 3004. 



Sitanion Leckenbyi. Culms stout, erect, terete, striate, glabrous, 

 pale green with brown nodes, 6-8 dm. high; sheaths anipliate and 

 open at the throat, those of the culm shorter than the internodes 

 and glabrous, those of the sterile shoots longer than the internodes 

 and ciliate on the margins ; ligule short, scarious ; blades stiff*, erect 

 or divergent, 4-12 cm. long, 2-3 mm. wide, linear lanceolate, 

 involute, glabrous beneath, strigose above, the attenuate apex very 

 sharp ; spikes 1-1.5 dm. long, rather slender, erect or sometimes 

 flexuous, long exserted ; empty glumes 4, equal, entire, narrowly 

 setaceous, erect, 2.5-3 cm. long, scabrous the entire length ; flower- 

 ing glumes narrowly lanceolate, 8-9 mm. long, rounded on the 

 back, the lower half smooth, the upper half scabrid, bifid at the 

 apex and tipped with a straight, strongly scabrous awn, 3—4 cm. 

 long; palet as long as the glume without the bifid apex, scabrous 

 on the nerves, obtuse; joints of the rachis clavate, flattened, 5-8 mm. 

 long, scabrous on the margins of the upper half, glaucous. 



Sandy bars of Snake River at Wawawai, Wash., 17 June, 1899, 

 C. V. Piper, No. 3003, and A. B. Leckenby. This species falls into 

 J. G. Smith's § Horderiforrase. 



Sitanion Brodiei. Culms erect 4-5 dm. high, smooth, terete, 

 the nodes brown ; sheaths striate, closely wrapping the stem, smooth, 

 longer than the internodes, wide open at the throat; ligule very 

 short, hyaline ; blades stiff*, smooth on each side, involute, lanceolate, 

 sharply acuminate, 9-13 cm. long, 3-4 mm. wide; spike pale 

 green, long exserted, stout, erect, 5-7 cm. long; empty glumes 

 undivided, 7 mm. long, subulate, gradually attenuate into an awn 

 about 10 mm. long, 2-3 nerved, scabrous on the nerves and 

 awn ; flowering glume lanceolate, rounded on the back, densely 

 appressed pubescent, 10 mm. long, acuminate, attenuate into a 

 scabrous awn 20-25 mm. long, sometimes with two very short 



