26 



what spreading in flower, slender and somewhat swollen at the base of the 

 spikelets. Spikelets 3-4 cm. long exclusive of awns, nearly smooth to scabrous- 

 puberulent, 7-11 flowered; empty glmnes lanceolate, acuminate, the lower 

 1-nerved, 9-12 mm. long, the upper 3-nerved, 13-16 mm. long; flowering glume 

 linear-lanceolate, 15-18 mm. Jong, usually glabrous or merely scabrous, somewhat 

 curved outward when old, distinctly 3 or faintly 5-7-nerved, with two acute 

 hyaline teeth, 2-3 mm. long, and a rather xt out, tapering, rough, aomewhat curved 

 awn about 16-2-2 mm. long; palea reaching about to the point of the insertion of 

 the awn, pectinate-ciliate on the keels, 

 species introdut'ed from Europe rather widely distributed in California and 



reported from Michigan by 

 Beal in "Grasses of North 

 America." 

 Specimens examined. — California: 

 San Jose (H. A. Brainard) ; 

 near Antioch (J. Burtt Davy 

 111) ; Ft. Tejon (S. B. Parish 

 1994) ; New York Falls, Ama- 

 dor County (Geo. Hansen 

 2123). 

 11. BROMUS MAXIMUS 

 Desf. Fl. Atl. 1: 95. t. 26. 

 1798. (Fig. 11.) 



An erect or ascending annual, 2-4 

 dm. high, with a smooth culm. 

 Sheaths pilose-pubescent; li- 

 gule 3-4 mm. long, rounded 

 above, lacerate; blades flat, 

 linear, 3-5 mm. broad and 

 about 2-3 dm. long, pilose 

 both sides. Panicle erect, 

 somewhat secmid and nar- 

 row, open in flower, closing 

 more or less afterwards, 5-10 

 cm. long, lower branches 2-3, 

 about 1 .2 cm. long, bearing 

 1-2 spikelets. Spikelets usu- 

 ally 5-7 -flowered, 3.5-5 cm. 

 long, exclusive of the awns, 

 terete or somewhat laterally 

 compressed at maturity; emp- 

 ty glumes smooth, lanceolate, 

 acuminate, the lower 15-20 

 mm. long, strongly 1-nerved, 

 margin hyaline, the upper 

 broader, 25-30 mm. long, 

 prominently 3-nerved; flowering glume 5-nerved, 25-30 mm. long, harshly sca- 

 brous to scabrous-puberulent, 2-toothed at the apex ; teeth hyaline, acute, about 

 3-4 nun. long, awn stout, 3.5-4-5 cm. long, very rough, tapering toward the end, 

 inserted just below the teeth; palea somewhat shorter than its glume; rachilla 

 slender, puberulent, about 3 mm. long. 

 Tj'pe from northern Africa 



Specimens examined. — California: Stanford University (C. Ritter 305) ; (J. B. Davy 

 in 1894) . 



Fig. 10. — Bromus madritensis : a, empty glumes and two 

 lower florets; b, flowering glume with part of the awn. 



