284 OHIO BIOLOGICAL SURVEY 



1. Sphenopholis obtusata (Mx.) Scrib. Blunt-glumed Eaton- 

 grass. An erect rather stout grass, \-2 l / 2 ft. high with a dense gen- 

 erally spike-like, strict panicle with erect branches. Spikelets 2-3- 

 flowered ; lemma narrow, obtuse ; empty glumes unequal, often 

 purplish, the first narrow, shorter than the inner w r hich is sub- 

 cucullate and about six times as wide. 



In dry soil. June-August. Xo specimens. 



2. Sphenopholis pallens (Spreng.) Scrib. Tall Eaton-grass. An 

 erect, usually slender grass with simple stems, 1-3 ft. high, and 

 lax, nodding panicles. Spikelets oblong-lanceolate, usually numerous 

 and somewhat crowded and appressed to the branches ; lemma 

 lanceolate, acute, rarely awned ; empty glumes unequal, the outer 

 narrow and about % as broad as the obtuse or abruptly acute inner 

 one, which is smooth or somewhat rough on the keel. 



In woods or moist soil. June, July. General. 



3. Sphenopholis nitida (Spreng.) Scrib. Slender Eaton-grass. 

 A grass with very slender erect stems, 1-2 ft. high, with pubescent 

 sheaths and leaves, and with a loosely flowered panicle, the branches 

 spreading at flowering time and later becoming erect. Spikelets 

 cuneiform, not crowded ; empty glumes smooth, the outer about 

 one-third as w r ide as the inner; lemma narrow, smooth, obtuse, rarely 

 short-awned. 



In dry woods. May, June. Cuyahoga, Knox, Licking, Fairfield, 

 Hocking, Lawrence, Adams. 



9. Koeleria Pers. Koeler-grass. 



Tufted perennials with narrow leaves and mostly densely 

 flowered terminal spike-like panicles. Spikelets 2-4-flowered ; rachilla 

 prolonged into a naked pedicel behind the upper palet; empty glumes 

 narrow, acute, unequal, keeled, with scarious margins; lemma faintly 

 3-5-nerved ; palet 2-keeled ; grain free, loosely inclosed within the 

 subrigid lemma. 



1. Koeleria cristata (L.) Pers. Crested Koeler-grass. A per- 

 ennial grass with simple rigid erect stems, l-2j£ ft. high, with 

 retrorsely pubescent sheaths, and with pale green, spike-like, cylin- 

 drical panicles. Spikelet 2-5-flowered ; lemma scabrous, shining. 



A valuable pasture grass in the west. In dry sandy soil, es- 

 pecially on prairies. July-September. Ottawa County. 



10. Korycarpus Zea. Korycarpus. 



Erect, nearly smooth parennials with narrow paniculate or 

 racemose inflorescence. Spikelets 3-5-flowered, the rachilla articu- 

 lated between the flowers; empty glumes much shorter than the 



