meadows, or on the muddy margins of streams. It grows 4 to 6 

 feet high, with a flattened smooth stem, and develops its reddish 

 panicles from several of the joints as well as at the top. It produces 

 a large amount of foliage,, which makes good hay if cut before flower- 

 ing time; if left later the stalks become hard and wiry. Often cut 

 for hay on low grounds. 



2. P. amarnm, Ell. South Carolina to Florida. 



Grows among the sand hills near the sea coast. The leaves are 

 very bitter. 



P. amarnm, var. minor, V. <& S. North Carolina to Connec- 

 ticut, a smaller form growing northward. 



3. P. anceps, Michx. Massachusetts to Texas. 



A perennial grass, when well developed resembling the P. agros- 

 toides, but smaller, generally found in moist clay soil. Not a valua- 

 ble grass, but it frequently occurs in poor lands in sufficient quantity 

 to afford considerable grazing. 



4. P. augustifolium, Chapm-., (not Elliott.) Florida to Texas. 



5. P. autnmnale, Bo&c. Illinois and southward. 



P. autumnale, var. pubiflornm, Vasey. Texas and Arizona. 



6. P. bulbosum, H. B. K. New Mexico, Arizona, and Mexico. 

 P. bulbosum, var. minor, Vasey. (P. maximum, var. bulbosum, 



Munro.) . Same regions. 



This species grows from strong, bulbous rhizomas. It deserves 

 trial for cultivation. 



7. P. capillare, Linn. Very common. 



P. capillare, var. flexile, Gattinger. Kentucky. 

 P. capillare, var. geniculatnm, Scribner. Western. 

 P. capillare, var. minimum, JEngelm. Western. 



8. P. Chapmanii, Vasey. (P. tenuiculmum, Chap., not Meyer.) 



9. P. ciliatissimum, Buckley. Texas. 



10. P. claudestinum, Linn. Massachusetts to Texas. 



A coarse, broad-leaved species growing in wet, marshy ground. 



11. P. colonum, Linn. (P. Walteri, Ell.) Alabama to Texas. 



12. P. consanguineum, Lfth. (P. augustifolium, Ell.?) South. 



13. 1 J . commutatum, Schultz. (P. nervosum, Muhl.f) Pennsylva- 



nia to Louisiana. 



14. P. crusgalli, Linn. Barn-yard grass. Naturalized from Europe. 



