GRASSES OF IOWA. 



109 



Woodbine (Burgess); Algona (Hitchcock); Wheatland 277 (Hall); 

 Forest City 151 (Shimek) ; Armstrong 1063 (Cratty) ; Harrison 

 County (Burgess); Kossuth County (Hitchcock). 



North America. From New England to New York, Maryland 

 (Echo, Kearney), Massachusetts (Panimel), Tennessee, Kansas, Mex- 

 ico, Utah, Colorado (Ft. Collins, Crandall; Weld County, Pammel ; 

 Trinidad, Tracy), Wyoming (Hot Springs, A. and E. Nelson; Big 

 Horn, Pammel), California; Nebraska (Grand Island, Pammel 25), 

 Dakotas (S. D. Aberdeen, Griffith), Minnesota (Itaska Lake, Sand- 

 berg), Michigan, Wisconsin (La Crosse, Pammel 18), Ohio (Colum- 

 bus, Sullivant; Lancaster County), Canada (Ottawa River, Beardslee). 



General. Great Britian, on the continent of Europe, temperate and 

 arctic regions, to Asia and Kurile Islands. 



2. ANTHOXANTHUM. 



Avthoxantkum L. Sp. PI. 28. 1753. Bentham and Hooker. Gen. PI. 

 3: 1138. Hackel in Engler and Prantl. Nat. Pflanz. Fam. II. 2:43. /. 41. 

 Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 20. 55. /. 37. Steudel. Syn. 

 PI. Glum 1: 12 



Spikelets hermaphrodite, 1 -flowered, narrow, somewhat compressed. 

 Glumes 5, the first and second empty, unequal, awnless or mucronate- 

 pointed ; the third and fourth empty, shorter, two-lobed, clothed with 

 brown hairs, and awned below on the back; fifth shorter than the others, 

 hyaline, broadly obtuse, awnless. Palea narrower, 1 -nerved, in- 

 cluded within the fifth glume. Stamens two. Styles distinct. Grain 

 oblong, inclosed within the fifth glume, and palea, free. Aromatic, an- 

 nual or perennial grasses, with flat leaves and narrow, spike-like panicles. 



Living species, according to Bentham and Hooker, 4 or 5. Hackel 

 states 4, and Scribner 3 or 4. Found in north temperate and cold 

 regions of the old world. The best known member of the genus is sweet 

 vernal grass {Anthoxanthum odoratum) . (Name referring to the yel- 

 low hue of the spikelets in some species.) 



ANTHOXANTHUM ODORATUM. 



Anthoxanthum odoratum L. Sp. PI. 28. 1753. Watson and Coul- 

 ter. Gray. Man. Bot. 639. pi. 13. 1890. (6th ed ) Scribner. Grasses of 

 . Tenn. Bull. Univ. Tenn. Agrl. Exp. Sta. 7: 62. f. 71. 1894. Scribner. Am. 

 Grasses. Bull. U. S. Dept. Agrl. Div. Agios. 7: 88. f. 82 1900. (3d ed.) 

 Beal. Grasses of N. A. 2: 184. 1896. Nash in Britton and Brown. 111. Fl. 

 1: 131. /. 293. 1896. Vasey Contr. U. S. Nat. Herb. 3: 43. 



