300 OHIO BIOLOGICAL SURVEY 



stems, y 2 -\ ft. high, with inflated sheaths, and with the terminal 

 panicle usually more or less included in the upper sheath, the lateral 

 panicles enclosed in the sheaths. Lemma acute, glabrous, about 

 equalling the acute palet. 



In dry and sandy soil. Aug., Sept. Cuyahoga, Wayne, Huron, 

 Auglaize. 



4. Sporobolus cryptandrus (Torr.) Gr. Sand Dropseed. A per- 

 ennial tufted grass with erect, simple stems, t^-3^2 ft. high, or some- 

 times branched at the base, and with an ample lead-colored, usually 

 open panicle included at the base in the upper sheath. Leaves long- 

 acuminate with a peculiar joint-like constriction about the middle 

 of the blade and a ring of long white hairs at its base. Lemma acute, 

 longer than the palet. 



In sandy soil. Aug.-Oct. Lucas, Ottawa, Erie, Lorain. 



5. Sporobolus heterolepis Gr. Northern Dropseed. A tufted 

 perennial grass with rather stout, wiry, erect stems, 1-3 ft. high, and 

 long exserted panicles with ascending branches. Lemma glabrous, 

 obtuse or subacute. 



In dry soil. Aug., Sept. Franklin, Madison, Champaign. 



36. Calamagrostis Adans. Reed Bent-grass. 



Tall often reed-like perennial grasses with flat leaf-blades, run- 

 ning rhizomes, and panicles with many spikelets. Spikelets 

 1-flowered, rachilla prolonged behind the flower into a hairy bristle 

 or pedicle ; empty glumes subequal, keeled, membranous ; lemma 

 awned on the 1 back, surrounded at the base with copious long hairs; 

 palet shorter than the lemma, 2-nerved ; grain free, enclosed in the 

 flowering glumes. 



1. Prolongation of the rachilla hairy its whole length; awn straight; panicle 

 open, its branches spreading or ascending, usually loosely flowered. 



C. canadensis. 



1. Prolongation of the rachilla hairy only at the summit; panicle contracted, 

 its branches erect. C. cinnoides. 



1. Calamagrostis canadensis (Mx.) Beauv. Bluejoint Reed 

 Bent-grass. A large grass with clustered, simple or somewhat 

 branched, erect, hollow stems, 2-5 ft. high, and a loose, usually 

 purplish panicle, the slender fascicled branches erect or ascending. 

 Spikelets with copious hairs on the callus, about as long as the 

 flowering glumes, and surrounding them ; lemma thin, erose-truncate, 

 bearing a delicate awn on the back. 



An important and valuable meadow grass, good for forage and 

 hay. In swamps and wet soils. July-Sept. Northern Ohio, as far 

 south as Stark, Franklin, and Auglaize Counties. 



