40 



North Carolina: Biltmore (Biltniore Herbarium 128a). Georgia: Rome (Dr. 



Chapman). Tennessee: Knoxville (A. Ruth 30) ; Franklin County (H. Eggert 28). 



Kentucky: Big Black Mountain (T. H. Kearney jr. 276). Ohio: Cincinnati (C. G. 



Lloyd 3515). Illinois: Chicago (H. N. Bahcock); Mount Carmel (J. Schrenck). 



Michigan: Rochester (O. A. Farwall 563). lawiL: Lebanon (C. R. Ball and A. F. 



Sample 26) ; Ames (C. R. Ball 123); Fayette County (B. Fink 290, 629); Decatur 



County (T. J. and M. F. L. Fitzpatrick 12). Minnesota: Duluth (G. Vasey ). TI7/0- 



ming: Sundance (T. A. Williams 2596). Nebraska: Julian (C. L. Elmore 135); 



near Mullen (P. A. Rydberg 1775). Missouri: Independence (B. F. Bush 812); 



■ Courtney (B.F. Bush 594). St. 



Louis (H. Eggert). Arkansas: 

 ( F. L. Harvey 9 ) . Indian Ter- 

 ritory : Between Fort Cobb and 

 Fort Arbuckle (Dr. E. Palmer 

 407). 

 This species has been the cause of 

 much confusion, and has been 

 very differently interpreted by 

 different authors. Some, in- 

 cluding Vahl, Hooker fil., 

 Grisebach, and Fournier, ap- 

 parently accepting Linnteus's 

 doubtful reference to Feuillee's 

 plate of B. catltarticvs as the 

 true B. purgans, have referred 

 various forms of the subgenus 

 ('eratochloa. to it. (Others, as 

 Torrey and Hooker, have re- 

 ferred B. kalmii and related 

 forms to it, while Dr. Gray 

 seems to have been the first to 

 apply the name to the plant 

 described by Linnjeus, whose 

 description is so complete as 

 to leave little doubt as to the 

 plant he had in hand. The 

 species shows occasional con- 

 necting forms with B. clUatns. 

 It is also very closely related to 

 B. ramosus of Europe. In the 

 West and North it appears to 

 merge into B. richardsnni. It 

 is distinguished from B. kalmii, 

 another near relative, by its 

 longer and narrower empty 



glumes and the shorter and sparser pubescence of the flowering glumes, as well 



as by its larger panicle and broader leaves. 

 A specimen in the Columbian University herbarium from Meisner's Herbarium, col- 

 lected by Frank near Cincinnati, and labeled " Bronuis slendelii Frank n. sp.? " is 

 merely a form of this species with a somewhat smaller panicle than usual. 



21a. BROMUS PTJRGANS LATIGLUMIS (Scribn.) n. comb. Broiiuis ritiafus 

 laiighiinis Scribn. in herb. Bronius aKissitiuis rnrsh, Fl. Am. Sejit. 2 : 728. 1814. 

 NotGilib. 1792. Bromus cdialus porteri Rydl'. Coiitr. Nat. Herb. 3: 193. 1895. 



Fig. '22.—Jiromuspurc/ans: ((.lower portion of a spikelet; 

 b, dorsal view of a flowering glume. 



