GRASS FAMILY 



233 



20. Bromus rubens L. 

 Foxtail Brome-grass. Fig. 549. 



Bromus rnbciis L. Cent. PI. 1: 5. 1755. 



Culms 15-40 cm. tall, i)ul)erulent below the panicle; 

 sheaths and blades pubescent; panicle erect, compact, 

 ovoid, usually purplish, 3-7 cm. long; spikelets 7-11- 

 flowered, about 2.5 cm. long; glumes narrow, acumi- 

 nate, pubescent or sometimes smooth, the first 1- 

 nerved, 7-9 mm. long, the upper 3-nerved, 10-12 mm. 

 long; lemmas lanceolate, acute. 5-nerved, pubescent 

 or smooth. 12-16 mm. long, the apex deeply cleft 

 into 2 long-acuminate hyaline teeth, 4-5 mm. long; 

 awn straight, 18-22 mm. long. 



Dry hills and in waste or cultivated ground, in the Arid 

 Transition Zone; Washington to southern California; common 

 in middle and southern California; introduced from southern 

 Europe. Apr. -June. Type locality, European. 



21. Bromus madritensis L. 

 Spanish Brome-grass. Fig. 550. 



Broiiiiis r.iadritcnsis L. Cent. PI. 1: 5. 1755. 



Culms tufted. 30-60 cm. tall; sheaths smooth 

 or the lower slightly pubescent ; blades puberu- 

 lent or nearly smooth; panicle erect, 5-10 cm. 

 long, oblong-ovoid in outline, contracted and 

 rather dense ; glumes narrow, lanceolate, acumi- 

 nate, the first 1 -nerved, 9-12 mm. long, the sec- 

 ond 3-nerved, 14-16 mm. long ; lemmas narrow, 

 linear-lanceolate, 14-18 mm. long, usually glabrous 

 or merely scabrous, somewhat curved outward 

 when old, distinctly 3- or faintly 5-7-nerved, with 

 2 acute hyaline teeth, 2-3 mm. long; awn rather 

 stout, tapering, somewhat curved, 16-22 mm. 

 long. 



Open ground and waste places, in the Transition Zone; 

 Dregon to Washington; introduced from Europe. May- 

 June. Type locality, European. 



22. Bromus brizaeformis Fisch. & Mey. 



Rattlesnake Grass. 



Fig. 551. 



Bromus brizaeformis Fisch. & Mev. Ind. Sem. Ilort. Petrop. 

 3: 30. 1837. 



Culms 30-60 cm. tall; sheaths and blades pilose- 

 pubescent; panicle 5-15 cm. long, lax, secund, nod- 

 ding; spikelets oblong-ovate, laterally much com- 

 pressed, 1.5-2.5 cm. long, about 10 mm. wide; 

 glumes broad, obtuse, smooth or minutely scabrous, 

 the first 3-5-nerved, about half the length of the 

 broader second, the second 5-9-nerved, 6-8 mm. 

 long; lemma 10 mm. long, very broad, obtuse, 

 smooth, with a broad scarious margin, awnless or 

 nearly ^o. 



Sandy fields and waste ground; occasional in the western 

 States, Washington to California, rare in the eastern States, 

 introduced from Europe. 



