38 Tennessee Elora. 



P. flexile (Galtinger) Scribner. Cedar g-lades ; very com- 

 mon. July-September. Characteristic of the glades. 



P. minus (Miihl.) Nash. P. capillare var. minimum En- 

 gelm in litt. Loamy fields, near Rising Sun Bluff, below 

 Nashville. 



P. verrucosum Miihl. Bogs along Cumberland River. 

 Mitchellville. July. 



SYNTHERISMA Walt. (Digitaria Scop.) 



Syntherisma sanguinalis (L.) Nash. Digitaria sanguinalis 

 Scop. Crop grass. Yields a spontaneous crop of hay in corn- 

 fields at the close of the growing seasoji. September, Octo- 

 ber. 



S. linearis (Krock.) Nash. (Panicum glabrum Gaud.) 

 Pastures and waste grounds. A very valuable pasture grass, 

 maturing later than the former. Middle Tennessee. Sep- 

 tember. October. 



S, filiformis ( L.) Nash. Digitaria filiformis Miihl. Pan- 

 icum filiforme L. In siliceous soil. O. S. July-September. 



S. serotina Walter. P. serotinum Trin. Glades. Septem- 

 ber. 



IXOPHORUS Schlecht. (Setaria Beauv.) 



Ixophorus verticillatus (L.) Nash. Setaria verticillata 

 Beauv. Fox tail grass. Sparingly found in fields and gar- 

 dens. Introduced. July-September. 



I. glaucus (L.) Nash. Setaria glauca Beauv. Yellow fox 

 tail. Pigeon grass. Introduced and now ubiquitous. July- 

 September. 



I. glaucus-laevigatus Chapm. Cedar glades ; very common. 

 July-September. 



I. viridis (L.) Nash. Setaria viridis Beauv. Introduced 

 and now ubiquitous. July-September. 



I. Italicus (L.) Nash. Setaria Italica R. & S. Hunga- 

 rian grass; Italian millet. In cultivation and frequently es- 

 caped into waste places. July-September. 



I. Germanicus (Beauv.) Nash. Setaria Germanica Beauv. 

 German millet. Both millets give important hay crops. July- 

 September. 



CENCHRUS L. 



Cenchrus tribuloides L. Burgass. On the sandy flats 

 along Mississippi)! River. Frequently intermixed with equis- 

 etum robustum. August. 



