332 GRASSES OF IOWA. 



DESCRIPTION. 



Four Rowed Barley. Annual, 2 to 3 feet (4-7 dm.) high, 

 smooth. Leaves linear-lanceolate, keeled, nearly smooth ; sheaths striate, 

 smooth, auricled at the throat; ligule very short. Spikes 3 to 4 inches 

 (6-9 cm.) long, somewhat four-sided, rachis flattened, pubescent on the 

 margins. Spikelets with one perfect floret ; empty glumes, narrowly lin- 

 ear, pubescent, terminating in a slender awn; flowering glume five- 

 nerved, scabrous near the apex, long-awned; awn flattened, keeled, some- 

 what three-nerved, serrulate on the margins. 



DISTRIBUTION. 



Iowa. Alden (Stevens) ; Ames (E. R. Wilson, P. H. Rolfs) ; 

 Jefferson (Stewart) ; Story City (Pammel and Stewart). 



North America. This cereal is without doubt one of the most 

 ancient of cultivated plants. It is supposed to have originated from H. 

 spontaneum Koch which grows wild in Asia Minor and Caucasian coun- 

 tries to Persia and Beloochistan as well as Syria and Palestine. 



3. HORDEUM JUBATUM. 



Hordeum jubatum L. Sp. PI. 85. 1753. Watson and Coulter. Gray. 

 Man. Bot. 672. pi. 11. 1890. (6 ed.) Beal. Grasses of N. A. 2: 644. 1896. 

 <2edJ Nash in Britton and Brown. 111. PI. 1: 229. /. 531. 1896. Scrib- 

 ner. Bull. U. S. Dept. Agrl. Div. Agros. 17: 307. /. 603. 1899. 



DESCRIPTION. 



Squirrel Tail Grass. A smooth, slender and erect, annual or 

 biennial (perennial ?), 1 to 2 feet (2-4 dm.) high, with flat leaves, and 

 long, bearded, nodding spikes, l\ to 5 inches (5-10 cm.) long. Empty 

 glumes awn-like, i-J to i\ inches (3-5 cm.) long, the flowering glume of 

 the central spikelet 3 to 4 lines (6-8 mm.) long, terminating in a slender 

 awn I \ to i\ inches (3-5 cm.) long. Moist, saline soils. June to August- 

 Squirrel tail grass is widely distributed in Iowa; reported from 

 nearly every county. A most troublesome weed in pastures. See figure 

 235, on page 333. 



DISTRIBUTION. 



Iowa. Forest City (Shimek) ; Missouri Valley, 885 Elmore, 

 Minn., Iowa-Minnesota line, Eagle Grove, 896 Ledyard, Jefferson, 

 Logan, 659 Missouri Valley, Carroll, Council Bluffs, 1307 Council 

 Bluffs, Ames, Dakota City, 3218 Clinton, Webster City, South Dakota 



