GRASSES OF OHIO 
305 
2. Muhlenbergia mexicana (L.) Trin. Mexican Muhlenbergia. 
A glabrous grass with erect or often prostrate, much-branched 
stems, 2-4 ft. high, with numerous conspicuous rhizomes, covered 
with short appressed scales, and with a long contracted panicle, 
usually partly included within the upper sheath, its branches spike¬ 
like and erect or appressed. Lemma acuminate, scabrous, sometimes 
awned. 
In swamps and borders of fields. Aug., Sept. General. 
3. Muhlenbergia racemosa (Mx.) B. S. P. Marsh Muhlen¬ 
bergia. A grass with erect, usually branched stems, 1-3 ft. high, 
with numerous conspicuous rhizomes covered with short, appressed 
scales, and with dense spike-like panicles, interrupted at the base, 
the branches erect or appressed. Empty glumes aristate; lemma 
acuminate, awnless, its midrib strongly scabrous. 
In wet places. Aug.-Oct. Summit, Wayne, Huron, Wyandot, 
Champaign, Licking. 
4. Muhlenbergia umbrosa Scrib. Wood Muhlenbergia. A grass 
with erect branched stems, 1-3 ft. high, with numerous conspicuous 
rhizomes, covered with short appressed scales, and with somewhat 
lax panicles, the branches erect or ascending. Lemma strongly scab¬ 
rous, attenuate into a slender awn. 
In moist woods and along streams. Aug.-Oct. Cuyahoga, 
Champaign. 
5. Muhlenbergia tenuiflora (Willd.) B. S. P. Slender Muhlen¬ 
bergia. A grass with slender, simple or sparingly branched stems, 
2-3 ft. high, with numerous conspicuous rhizomes covered with short, 
appressed scales, and with a loosely flowered, slender panicle with 
appressed branches. Lemma scabrous, tapering into a slender awn. 
In rocky woods and ravines. Aug., Sept. Portage, Wayne, 
Fairfield, Madison, Greene. 
6. Muhlenbergia schreberi Gmel. Spreading Muhlenbergia. A 
diffusely much-branched grass with erect or ascending stems, 1-3 
ft. high, from a decumbent base, often rooting at the lower nodes, 
and with slender, somewhat lax panicles, the erect branches rather 
densely flowered. Empty glumes minute, the outer one nearly ob¬ 
solete; lemma strongly scabrous, tapering into a slender awn. 
In dry woods, hillsides, and waste places. Aug., Sept. General. 
45. Brachyelytrum Beauv. Brachyelytrum. 
A tall perennial with flat leaves, simple stems from short knotty 
rhizomes, and a narrow, few-flowered panicle. Spikelets 1-flowered, 
narrow, the rachilla prolonged into a slender naked bristle; empty 
glumes minute, unequal; lemma rigid, 5-nerved, ending in a long 
