24 



Syn. PI. Gram. 229. 1854. Bromus barhatoides Bea\, Grass.'N. A. 2: 61i. 1896. 

 Avena symphicarpi Trin. mss. (p.p.) sec. Desvaux 1 . c. . ( Fig. 9. ) 

 An erect c.espitose annual, usually branching below, mostly 3-6 dm. higli. C!ulm 

 smooth or pubescent at the nodes. Sheath usually pilose-pubescent, sometimes 

 nearly smooth; ligule rovmded or subtruncate, dentate, about 1mm. long; blades 

 linear to linear-lanceolate, 6-1-5 cm. long, 3-5 mm. wide, mostly pilose-pubescent 

 throughout, sometimes nearly smooth. Panicle usually narrow and somewhat 

 crowded suberect, 8-20 cm. long; branches rather numerous, slender, ascending 

 or diverging in fruit. Spikelets narrow, lanceolate at first, becoming spread and 



oblong lanceolate in flower and 

 fruit, vtosthj 5-7-floivered, 1.5-2 cm. 

 long; empty glumes lanceolate, 

 acununate, or with a subulate pro- 

 longation, smooth, the lower 1- 

 nerved, rarely 3-nerved, 8-11 mm. 

 long, the upper broader, 3-nerved, 

 rarely 5-nerved, 13-16 nmi. long; 

 flowering glume coarfely and suh- 

 sparsely pubescent, 5-nerved, 12-15 

 mm. long, acuminate, with two nar- 

 row teeth 2-S mm. long; the pubes- 

 cence on the callus is usually 

 slightly denser and longer than on 

 the glume; awn 15-20 mm. long, 

 twisted below, bent below the middle 

 and strongly divaricate when old. 

 Type from Chile. 



General distribution : California to Colo- 

 rado and south to Chile. 

 Specimens examined. — Utah : Sitgreaves 

 Pass, Camp 60 (Ives Expedition). 

 Nevada: Near Horse Spring (M. E. 

 Jones 5069f); valley of Virgin 

 River, Lincoln County (Coville & 

 Fiinston 1907). California: Los 

 Angeles (S. M. Tracy 163; Kellogg 

 & Harford 1087, 1094) ; near Pasa- 

 dena (O.D.Allen, April 12, 1885); 

 Panamint jNIountains, Inyo County 

 (Coville & Funston 506); near San 

 Francisco (Bolander 6128). 

 This plant is apparently related to B. 

 scoparius and B. tectorunt, though 

 differing in some respects from all 

 species of Bromus and showing 

 close relationship with Triseiwm and Avena, to both of which genera forms of it 

 have been referred. It appears to us, however, nearest to Bromus by reason of 

 its rather large numerous flowered spikelets, nearly closed sheath, and plicate 

 grain adhering to the palea. 



9a. BROMUS TRINII PALLIDIFLORUS Desv. in Gay Fl. Chil. 6: 441. 1853. 

 Bromus barbaioidcs stdcatits Beal, Grass. N. A. 2: 615. 1896. Trisetuni barbaium 

 major Vas. in herb, and Beal 1. c. 



Fig. 8^— Bromus scoparius: a, empty glumes; b, portion 

 of a spikelet, showing flowering glumes. 



