GRASSES OF OHIO 
301 
2. Calamagrostis cinnoides (Muhl.) Scrib. Nuttall’s Reed 
Bent-grass. A glaucous grass with stout, erect, simple stems, 3-5 
ft. high, and contracted panicles with erect branches. Lemma acum¬ 
inate, awned above the middle; callus-hairs about one-half the length 
of the flowering glumes; prolongation of the rachilla bearing a tuft 
of terminal hairs. 
In moist soil. July, Aug. No specimens. 
37. Agrostis L. Bent-grass. 
Annuals or perennials with flat or bristle-like leaves, membran¬ 
ous ligules, and open or contracted panicles. Spikelets 1-flowered; 
empty glumes subequal, membranous, keeled, acute; lemma broad, 
obtuse, awnless or dorsally awned; palet hyaline, shorter than the 
lemma, sometimes minute or wanting; grain free, loosely inclosed 
in the lemma. 
1. Lemma with a prominent dorsal awn just above the middle; palet minute 
or none. canina. 
1. Lemma awnless or rarely with a short awn. 2 
2. Palet conspicuous, at least half as long as the lemma, 2-nerved; panicle 
open. A. alba. 
2. Palet inconspicuous, minute and nerveless or wanting. 3 
3. Stems weak, decumbent or prostrate at the base; leaves lax. A. schweinitzii. 
3. Stems and leaves erect. 4 
4. Branches of the panicle not elongated, usually branching at or below the 
middle. A. perennans. 
4. Branches of the diffuse panicle long and capillary, usually branching above 
the middle. A. hyemails. 
1. Agrostis alba L. Red-top (Bent-grass). A perennial grass 
with erect or decumbent stems, ^^- 2^/2 ft. high, with creeping rhi¬ 
zomes or stoloniferous, and with a contracted or open usually purplish 
panicle, the branches verticillate and ascending. Lemma nearly equal¬ 
ing the empty glumes, 3-nerved, rarely short-awned. 
An important and valuable grass, extensively cultivated for pas¬ 
ture and hay. In flelds and meadows. July-Sept. General. From 
Europe. 
2. Agrostis schweimtzii Trin. Thin Bent-grass. A perennial 
grass with weak, slender, simple or sparingly branched stems, 1 - 2^2 
ft. high, from a decumbent or prostrate base, and with an open panicle 
with widely spreading branches. Lemma shorter than the acuminate 
unequal empty glumes; palet small or wanting. 
In damp shaded places. July-Sept. Rather general. 
3. Agrostis hyemalis (Walt.) B. S. P. Rough Bent-grass. A 
perennial grass with very slender simple erect stems, 1-2 ft. high, 
and loose purplish panicles, the whorled capillary branches spikelet- 
