GRASSES OF OHIO 
291 
Tribe, Hordeae. Barley Tribe. 
Grasses ivitli laterally eoinpressed, 2-several-floiaered spikelefs 
jointed above the empty glumes and arranged on opposite sides of a 
jointed raehis forming equilateral spikes; spikelets sometimes zvitli but i 
perfeet Hozver and a mere vestige of the second; leaf-blades zvitli a pair 
of more or less zvell-developed appendages at the base. 
22. Lolium L. Darnel. 
Annual or perennial grasses with simple erect stems, flat leaves, 
and terminal spikes. Spikelets several-flowered, solitary, with the 
edge turned toward the raehis; empty glumes rigid; lemmas rounded 
on the back, 5-7-nerved, awned or awnless; palet 2-keeled; grain 
adherent to the palet. 
1. Outer empty glume shorter than the spikelet; short-lived perennials. 2 
1. Outer empty glume as long or longer than the spikelet; lemmas awned or 
awnless; annuals. L. teniulentum. 
2. Lemmas awnless. L. perenne. 
2. Lemmas, at least the upper ones, awned. L. miiltiflorum. 
1. Lolium perenne L. Red Darnel. A short-lived perennial 
grass with an erect, simple stem, ^-2;^ ft. high, and a flat spike. 
Spikelets 5-10-flowered; lemma obscurely nerved, acuminate, awn¬ 
less. Cultivated as a pasture grass and also used for hay. 
In cultivated fields and roadsides. Also called ray-grass and 
rye-grass. June-August. Rather general. From Europe. 
2. Lolium multiflorum Lam. Awned Darnel. A short-lived 
perennial grass with tufted stems, roughened below and in the in¬ 
florescence, 2-3 ft. high, and with a loose spike of 20-30 spikelets. 
Spikelets 10-20-flowered; lemma awned. Cultivated for hay. 
In fields and roadsides. Also called Italian rye-grass. June, 
July. From Europe. Flamilton, Madison. 
3. Lolium temulentum L. Poison Darnel. An annual glabrous 
grass with simple, erect stems, 2-4 ft. high, and a flat, coarse spike. 
Spikelets 5-7-flowered; outer empty glume equalling or exceeding 
the spikelet; lemma obscurely nerved, awned or awnless. The grain 
of this grass is said to be poisonous. 
In waste and cultivated fields; often a troublesome weed. June- 
August. No specimens. From Europe. 
23. Agropyron J. Gaertn. Couch-grass, Wheat-grass. 
Perennial grasses with simple stems and terminal spikes. Spike¬ 
lets 3-many-flowered, solitary in the notches of the raehis. the side 
