PBOLIFIO PANIC. 141 



south. Stems flat, two to four feet high. Flowers in 

 August. 



Agrostis-like Panic Grass (Panicum agrostoides) 

 has flattened, upright stems, two feet high ; leaves long, 

 sheaths smboth ; spikelets on the spreading branches, 

 crowded, and one-sided, ovate, oblong, acute, purplish. 

 It is common on wet meadows and borders of rivers, 

 from Massachusetts to Virginia, Illinois, and southward. 

 Flowers in July and August. 



Prolific Panic Grass {Panicum proliferum) grows 

 on brackish marshes and meadows, and is common 

 along the coast from Massachusetts southward, and 

 along the Ohio and Mississippi Rivers. It sometimes 

 appears on dry places. Cattle are fond of it. It differs 

 from the preceding in having culms thickened, succu- 

 lent, branched, and bent, ascending from a procumbent 

 base, and spikelets appressed, lance-oval, of a pale-green 

 color. 



Hair-stalked Panic Grass (Panicum .capiUare) 

 grows in sandy soils and cultivated fields everywhere. 

 Its culm is upright, often branched at the base, and 

 forming a tuft ; sheaths flattened, very hairy ; panicle 

 pyramidal, hairy, compound, and very loose ; spikelets 

 scattered, on long pedicels, oblong, pointed. Flowers 

 ,in August and September. 



Autumn Panic {Panicum autumnale) grows about 

 a foot high, with very slender stems, branching below. 

 Found from Illinois southward. 



Tall Smooth Panic Grass {Panicum virgatum). — 

 Stems upright, three to five feet high ; leaves very long, 

 flat; panicle large, loose, and compound; branches 

 spreading when grown, and drooping; spikelets scat- 

 tered, oval, pointed ; glumes usually purplish. Grows 



