352 
The Ohio Naturalist. 
[Vol. XIV, No. 8, 
minute, secoiid empty glume shorter than the fruit, faintly nerved. 
Woods. Rather general. No specimens from the northwestern 
counties. 
17. Panicum microcarpon Muhl. Small fruited. Panic- 
grass. A perennial, simple at first, later densely branched, 
prostrate or leaning, reflexed barbs at the nodes. The primary 
leaves 3 to 4 y 2 inches long, lA inch wide, secondary leaves 1 to 2 
inches long, ^ to | inch wide, smooth; primary panicle long 
exserted, rigid, 3 to 4R? inches long; secondary panicle smaller, 
lax and included; spikelets about ^ inch long, purplish, glab¬ 
rous; outer empty glume § as long as the spikelet; second empty 
glume slightly longer than the spikelet. Moist soil. Cuyahoga, 
Lorain, Erie, Fairfield, Hocking, Jackson, Adams. 
18. Panicum boreale Nash. Northern Panic-grass. An 
erect, simple, perennial 1-2 feet tall, later becoming somewhat 
branched and decumbent. Leaves erect, glabrous or rarely 
puberulcnt beneath, sparingly ciliate toward the base; Panicle 
2 to 1 inches long; narrow, ascending and spreading loosely flower¬ 
ed; spikelets A inch or slightly longer, outer empty glume 5 
as long as the second empty glume; second empty glume as long 
as the fruit. Moist open ground or woods. Fulton county. 
19. Panicum lindheimeri Nash. Lindheimer’s Panic-grass. 
An erect or spreading dichotomous perennial, glabrous, or pubes¬ 
cent below. Nodes swollen, intemodes longer than the sheaths 
ligule of hairs at the top of leaf sheath ^ to 3 /32 inches long; 
leaves 2 to 31 4 inches long, 1 4 to A inches wide; ascending when 
young with a few hairs on the margin of the base, glabrous above 
and glabrous or puberulent below; primary panicle long-exserted 
1 to : iy 2 inches long, about as broad as long, loosely flowered, as¬ 
cending or spreading; spikelet somewhat pubescent, purplish, less 
than A inch long; outer empty glume minute; second empty 
glume shorter than the fruit. Sandy woods and open grounds. 
Ashtabula, Hocking. 
20. Panicum hauchucae Ashe. Hairy Panic-grass. A per¬ 
ennial, erect and simple at first, later profusely branched and some¬ 
what decumbent. Nodes barbed; sheaths papillose-hirsute; 
ligule of hairs ^ inch or less long; leaves erect or spreading, thin 
lax or firm, upper surface pilose, lower surface appressed-pubes- 
cent with a luster; panicle 2 to 4 inches long, secondary shorter 
than the primary, branches ascending or spreading; spikelets 
pubescent, 1-10 inch or less long; outer empty glume minute; 
second empty glume papillose-pilose, slightly shorter than the 
fruit. Prairies or open ground. General. 
21. Panicum villosissimum Nash. Villous Panic-grass. A 
villous, olive green, erect or ascending slender perennial. Sheaths 
villous with spreading hairs, ligule at the top of leaf sheath | to 
jA inch long; leaves firm, ascending, 2% to 4 inches long, { 
