GRASSES OF IOWA. 247 



DISTRIBUTION. 



loiva. Winneshiek County (Fitzpatrick) ; New Albin, 933, I°wa- 

 Minnesota line (Pammel) ; Marshalltown, 263 (R- B. Eckles) ; Steam- 

 boal Rock, 2027 (Pammel). 



North America. Occurs from Pennsylvania to Virginia, District 

 of Columbia (Washington, McLain, Vasey; Washington, Hamilton 

 Hill, Ball), to Alabama and Florida; westward to Wisconsin, Minne- 

 sota '( Houston County. Pammel). Iowa, Missouri (Pilot Knob, Valley 

 Park, Crystal City, Pammel), to Texas. 



10. UNIOLA. 



(JniolaL. Sp. PL 71. 1753. Bentham and Hooker. Gen. PI. 3: 1192 

 Scribner. Bull. U. S. Dept. Agr. Div. Agros. 20: 142. /. 111. (Rev. 

 Ed.) 



Spikelets three to many-flowered; rachilla articulated above the 

 empty glumes and between the florets. Empty glumes at the base oi 

 the spikelet 3 to 8, compressed-keeled, acute, or acuminate-pointed, 

 striate, many-nerved. Grain compressed, oblong, free. Palea rigid, 

 two-keeled. Stamens 1 to 3. Styles distinct; stigmas plumose. Erect 

 plants, with simple culms, broad, and flat or narrow, and involute leaves, 

 and narrow and few-flowered, or ample, lax and many-flowered panicles. 

 There are five species, mostly in North America; one native to Cen- 

 tral America; one native to the Andes of South America. 



1. UNIOLA LAT1FOLIA. 



I mo/a latifolia Micnx. Fl. Bor. Am. 1: 70. 1803. Watson and Coul- 

 ter Gray Man. Bot. 663. 1890. (6 ed.) Scribner. Grasses ot Tenn. 

 Univ Tenn. 7:102.^. 35. 1 '. 139 . Bull. U. S. Dept. Agr. Div. Agros. 7: 270. 

 f.m. Bull. U. S. Dept. Agr. Div. Agros. 20: 142. f. 111. 1900. Beal. 

 Grasses N. A. 2: 516. f. 105. Nash in Britton and Brown. 111. Fl. 1: 197. 

 f. 452. 



DESCRIPTION. 



Broad Leafed Spike Grass. An erect grass, with rather stout, 

 simple culms, 2 to 5 feet (6-15 dm.) high, broad, spreading leaf-blades, 

 and a drooping panicle of large, flat spikelets, \ to 1 j inches (2-3 cm.) 

 Ion-, on capillary pedicels; empty glumes much smaller than the floral 

 ones! which are 4', to 6 lines (9-12 mm.) long, ciliate-hispid on the 

 winged keel. Sheaths shorter than the internodes; ligulc \ line ( 1 mm.) 

 long, lacerate-toothed ; leaf-blades 4 to 9 inches (10-22 cm.) long, \ to 



