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 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^ 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 A^arieties for its grain and straw. 
In fields and waste places, especially along railways. June, July. 
Erie, Belmont, Harrison, Tuscarawas, Morrow, Eayette, Madison, 
Preble, Eranklin. Escaped from cultivation. 
25. SecMe 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 
