27 



There are several names antedating the above which are regarded by some European 

 authorities as synonymous. B. rigidus Roth, Eoem. & Ust. Mag. Bot. 10: 21. 

 1790 is one. This has been adopted by Dr. Beal (Grass. N. A. 2: 611. 1896). 

 A careful study of the original description of this species, however, leads us to 

 l)elieve that the plant should at least l)e separated as a ^'ariety. The following 

 quotations from Roth's description 1. c. indicate the chief points of difference: 

 "Culmi . . primus erecti, denuim procumbentes, panicula . . spiculis . .10 ad 

 12 tloribus conipositis; corol he valvula exterior . . hirsuta." 

 The most important difference between our plants as well as the European speci- 

 mens examined and the above 

 description is in the hirsute flow- 

 ering glume. Mertensand Koch 

 in Roehl. Deutsch. Fl. 1: 689. 

 1823, say that they received a 

 specimen from Roth himself hav- 

 ing smooth spikelets, thus show- 

 ing that he regarded such forms 

 as belonging to his species. Not- 

 withstanding this these authors, 

 1. c, p. 691, regard B. ma.rimvf< 

 as at least varietally separate from 

 B. rigidns, so it seems to us best 

 to retain for the present for our 

 plant Desfontaine's name. Brn- 

 mus incraiisatnii Lam. Ene. 1 : 

 468. 1783, and B. rigen.9 L. Mant. 

 1 : 33. 1767, are also doubtful syn- 

 onyms. 



11a. BROMUS MAXIMUS 

 GUSSONIParl. Fl. Ital. 1: 

 407. 1848. Bromm gussoni 

 Pari. Rar. PI. Sic. 2: 8. 

 1840. Bromus sierilis Guss. 

 Fl. Sic. Prod. Suppl. 1 : 27. 

 1832. Not L. 1753. 



Differs from the species in its 



larger size, 4-7 dm. tall, 



larger and more lax panicle, 



1-2 dm. long, with the upper 



part somewhat drooping. 

 An introduced plant occurring in 



Arizona, California, and 



Washington. 



Speci mens examined. — Arizona : 

 Near Fort Huachuca (T. E. 

 Wilcox 172) ; Huachuca Mt. 



(J. G. Lemnion and wife 3107). California: Avakju, Santa Catalina Island 

 (Blanche Trask in 1898) ; San Francisco (Bolander) ; San Jose (H. A. Brainard, 

 in 1896) ; San Diego (C. R. Orcutt 1059) ; Woodland (J. W. Blankinship 39 and 

 40) ; Berkeley County (J. W. Blankinship 38) ; Clear Creek, Butte County (H. E. 

 Brown 199) ; Chico (E. Palmer 2034) ; New York Falls, Amador County (G. Han- 

 sen 598) ; near San Bernardino (J. B. Leiberg 3323 ) . Washington: Tacoma (A. B. 

 Leckenby in 1898). 



Fig. 11. — Bromus maximus : a, empty glumes with ii floret; 

 6, flowering glume with portion of the awn. 



