314 OHIO BIOLOGICAL SURVEY 



A bad weed. In dry soil and cultivated fields. July-Sept. Gen- 

 eral and abundant. 



7. Panicum gattingeri Nash. Gattinger's Panic-grass. An an- 

 nual grass with widely spreading or decumbent stems, sometimes 

 forming mats, branching at all the nodes, 1-2 ft. long, and with 

 numerous exserted oval panicles, smaller and less diffuse than in 

 P. capillare. Sheaths hirsute ; spikelets elliptic, acute, glabrous, very 

 turgid. 



In moist open ground. Aug.-Oct. Rather general. 



8. Panicum flexile (Gatt.) Scrib. Wiry Panic-grass. A slender 

 erect annual grass, y 2 -2 ft. high with a few erect branches from the 

 base and with a narrowly oblong panicle with ascending branches, 

 usually one-half the length of the entire plant. Spikelets acuminate, 

 solitary at the ends of the branchlets ; outer empty glume Y\ as l° n g 

 as trie spikelet. 



In moist or dry sandy soil. Aug.-Oct. Adams, Champaign, 

 Madison, Franklin, Erie, Cuyahoga. 



9. Panicum philadelphicum Bernh. Philadelphia Panic-grass. 

 A slender, erect or ascending, freely branching annual with zigzag 

 stems, 1-2 ft. long, and a rather few-flowered panicle about y$ the 

 length of the plant. Spikelets elliptic, acute, smooth, usually in 2's 

 at the ends of the divergent branchlets ; outer empty glume about 

 Yz the length of the spikelet. 



In dry woods and thickets. Aug., Sept. Trumbull, Ottawa. 



10. Panicum depauperatum Muhl. Starved Panic-grass. An 

 erect or ascending perennial ^-1^4 ft. high, with erect elongated 

 leaves, and a few-flowered, much exserted, terminal panicle, the 

 lower panicles on very short basal branches. Spikelets glabrous, 

 acute ; outer empty glume Ys the length of the spikelet. 



•In dry soil. June-Sept. Cuyahoga County. 



11. Panicum linearifdlium Scrib. Linear—leaf Panic-grass. A 

 densely tufted perennial grass with slender erect stems, ^2-1^2 ft. 

 high, and a rather few-flowered, loose panicle. Spikelets obtuse or 

 acutish, pubescent with spreading hairs ; outer empty glume Y^'Yi 

 as long as the spikelet. 



In woods and hillsides. May-July. Rather general. 



12. Panicum werneri Scrib. Werner's Panic-grass. A smooth, 

 light green, tufted, sparingly branched or simple perennial grass, 

 Yz-^Y* ft. high, with erect, linear, acuminate leaves and a loose open 

 panicle, which is finally long-exserted. Spikelets oval, somewhat 

 pubescent ; outer empty glume Ya as l° n g" as the spikelet. 



In dry woods, fields, and the drier parts of swamps. June, July. 

 Lake, Cuyahoga, Franklin, Athens. 



