34 Tennessee Flora. 



ALISMACEJE D. C. 



ALISMA L. 



Alisma Plantago-aquatica L. In shallow water. O. S. 

 June-September. 



ECHINODORUS Rich. Engelm. 



. Echinodorus radicans Engelm. Swamps along Cumber- 

 land River. July. 



SAGITTARIA L. 



Sagittaria latifolia Willd. Broad-leaved arrow head. 

 Ponds and shallow waters. O. S. August-September. 



S. latifolia pubescens Michl. East Tennessee. 



S. latifolia angustifolia Engelm. Hollow Rock, West Ten- 

 nessee. 



S. graminea Michx. West Tennessee. 



VALISNERIACE433 Dumort. 



PHILOTRIA Raf. 



Philotria Canadensis (Michx.) Britton. Elodea Canaden- 

 sis Michx. (Anacharis Canadensis Planch.). Stagnant wa- 

 ters. O. S. May-August. 



GRAMINEA Juss. 



MATIDE^. 



ZEA L. 



Zea Mays L. Indian corn. Cultivated in many varieties, 

 it constitutes the most important field crop in the State. 

 Sometimes it is^elf-sown at the roadside, but it does not at- 

 tain any growth without cultivation. M. 



TRIPSACUM L. 



Tripsacum dactyloides L. Gama grass. In moist pastures 

 near Hickman. A large patch in the old graveyard in Nash- 

 ville. June-September. 



I 

 ANDROPOGONACE.^E. 



ERIANTHUS Michx. 



Erianthus alopecuroides (L.) Ell. Plum grass.' Old fields, 

 Dickson County. Tullahoma. September, October. 



E, strictus Baldw. Tullahoma. Swamps near Tackson 

 S. M. Bain. 



