No. 26. 



ALOPECURUS GENICULATUS L. Var. ROBUSTUS Vasey, Ball. 



Torr. Club, xv. 13. 



Plant perennial, loosely tufted. 



Culms geniculate below, sometimes branched, thick, smooth, black at the nodes, 

 20 to 30 inches high. 



Leaves of culm 4 or 5 ; sheaths loose, open, smooth, striate, lower exceeding and 

 upper nearly equaling the internodes ; blades flat, hispid above, 2 to 3 lines wide, 3 to 

 6 inches long; ligule membranaceous, nearly acute, 2£ lines long. 



Inflorescence a dense, cylindrical, spicate panicle 2 to 3 inches long and ^ inch thick, 

 exserted at maturity. 



Spilcelets compressed, elliptical, 1 -flowered, 1 line long; empty glumes slightly 

 united at base, ovate, obtuse, short-hairy on the keel and obscure lateral nerves which 

 are nearly marginal, 1 line long; floral glume ovate-oblong, obtuse, thin, smooth, 5- 

 nerved, equaling the empty glumes; awn arising near the middle of the glume, straight, 

 scarcely exserted; palet wanting; grain broadly lanceolate, oblique, dark brown, § 

 line long. 



Plate XXVI; a, spikelet with empty glumes opened; 6, floret. 



Washington to Alaska, and in the mountains of British America. 



