92 



22. F. spectabilis, Jan. Introduced on ballast. 



23. F. tenella, Willd. Xew England to the Pacific. 



• F. tenella, var. aristulata, Torr. Texas and westward. 



Bromus, Linn. 



Spikelets five to many flowered, in a dense or lax or diffuse pan- 

 icle, snbterete or compressed, the rhachis between the flowers gla- 

 brous; outer glumes more or less unequal, shorter than the lowest 

 flower, membranaceous, acute, awnless or short mucronate, one to 

 nine nerved ; flowering glumes membranaceous to rigid and sub- 

 coriaceous, rounded on the back or compressed and keeled, five to 

 nine nerved, acute, or awned from below the mostly two-cleft apex ; 

 palet rather shorter than the glnmes, two-keeled, the keels rigid and 

 ■ciliate ; grain adhering to the palet. 



1. B. Aleutensis, Trin. Alaska. 



2. B. arvensis, Linn. Introduced from Europe. 



3. B. asper, Linn. Introduced from Europe. 



4. B. breviaristatus, Thurb. Rocky Mountains to Oregon. 



5. B. carinatus, Hook. California. 



6. B. ciliatus, Linn. From the Atlantic to the Pacific. 

 B. ciliatus, var. purgans, Gr. 



B. ciliatus, var. minor, JLunro. Rocky Mountains. 

 A tall, coarse species much addicted to rocky woodlands, but of 

 no agricultural value. 



7. B. depauperatus, Presl. California. 



8. B. erectus, Suds. Introduced from Europe. 



9. B. Hookerianus, Thurb. California to British America. 

 B. Hookerianus, var. minor, Scrib. Oregon. 



10. B. Kalmii, Gray. Vermont to Montana, northward. 

 B. Kalmii, var. occidentalis, Yasey. Rocky Mountains. 



11. B. maximus, Desf. Introduced in California and Arizona. 



12. B. mollis, Linn. Introduced from Europe. 



13. B. Orcuttianus, Vasey. South California to "Washington Terri- 



tory. 



14. B. Pumpellianus, Scrib. Rocky Mountains, Colorado to Mon- 



tano. 



15. B. racemosus, Linn. Introduced from Europe. 



16. B. rubens, Linn. Introduced from Europe. 



17. B. secalinus, Linn. Chess or cheat. Introduced. 



