292 OHIO BIOLOGICAL SURVEY 



of the spikelet turned toward the rachis ; empty glumes equal, usually 

 rigid, several-nerved, acute or awned ; lemma rounded on the back, 

 rigid, 5-7-nerved, usually acute or awned ; palet 2-keeled, the keels 

 bristly ciliate ; grain usually adherent to the palet. 



1. Lemma awn-pointed or with an awn usually not more than y 2 as long as the 

 body; stems from creeping rhizomes. A. repens. 



1. Lemma wth an awn about twice as long as its body ; stems tufted, without 

 creeping rhizomes. A. caninum. 



1. Agropyron repens (L.) Beauv. Couch-grass. A perennial, 

 usually glaucous grass with stem 1-4^4 ft. high, from a long, jointed, 

 running rhizome, and with a strict spike. Spikelets 3-7-flowered ; 

 lemma glabrous or more or less scabrous, strongly nerved, acute or 

 short awned at the apex. Often a bad weed. Frequently infested 

 with ergot. The rhizome is used in medicine. 



In fields, roadsides, and waste places. Also called Quitch-grass. 

 July, August. Rather general ; no specimens from the southeastern 

 part of the state. From Europe. 



2. Agropyron caninum (L.) R. & S. Awned Wheat-grass. A 

 perennial grass with simple, erect stems, 1-3 ft. high, and more or 

 less nodding spikes. Spikelets 3-6-flowered ; empty glumes awn- 

 pointed or bearing an awn ; lemma 3-5-nerved, usually scabrous 

 toward the apex, bearing an awn sometimes twice the length of its 

 body. 



In cultivated grounds and meadows. July-September. Portage 

 County. From Europe. 



24. Triticum L. Wheat. 



Tall annual grasses with flat leaves, with spikelets single at 

 the nodes of the spike, and with their sides turned to the rachis. 

 Spikelets 2-6-flowered ; empty glumes rather broad ; lemma rounded 

 on the back, many-nerved ending in one or more points or awns ; 

 palet 2-keeled ; grain with a deep groove, hairy at the apex, free. 



1. Triticum aestivum L. Wheat. An annual grass with erect 

 hollow stems, 1-5 ft. high, and compact terminal spikes. Spikelets 

 3-6-flowered ; lemma awned or awnless. Cultivated in numerous 

 spring and winter varieties for its grain and straw. 



In fields and waste places, especially along railways. June, July. 

 Erie, Belmont, Harrison, Tuscarawas, Morrow, Fayette, Madison, 

 Preble, Franklin. Escaped from cultivation. 



25. Secale L. Rye. 



Tall annual grasses with flat leaves and simple stems, with the 

 spikelets single at the nodes of the spike, and with their sides to the 

 rachis. Spikelets usually with 2 perfect flowers; empty glumes 



