Tennessee Flora. 73 



POLYGONUM L. 



Polygonum emersum (Michx.) Britton. P. Miihlenbergii 

 S. Watson. River swamps. Wild-goose pond near Mitchell- 

 ville. July-September. 



P. incarnatum Ell. In wet soil. O. S. June-September. 



P. lapathifolium L. Waste places. O. S. June-Septem- 

 ber. 



P. Pennsylvanicum L. In moist soil. O. S. July-Septem- 

 ber. 



P. Persicaria L. Lady's thumb. Waste and wet ground. 

 O. S. June-October. 



P. hydropiperoides Michx. Mild water pepper. Inundated 

 ground. O. S. June-September. 



P. Hydropiper L. Smart weed. In moist waste places. O. 

 S. July-September. 



P. punctatum Ell. P. acre H. B. K. Water smart weed. 

 Ponds and ditches. O. S. June-October. M. 



P. orientale L. Prince's feather. Escaped from gardens. 

 O. S. August. September. 



P. Virginianum L. Virginia knot weed. Thickets. O. S. 

 July-November. 



P. aviculare L. Knot-door weed. In all yards and road- 

 sides. O. S. June-October. 



P. erectum L. Frequently in company with P. aviculare L. 

 O. S. July-September. 



P. tenue Mich. Cumberland Plateau. Sewanee. July- 

 September. 



P. Convolvulus L. Black bind weed. Waste and culti- 

 vated grounds. Nashville. July-September. 



P. dumetorum L. Hedge buckwheat. Vicinity of Knox- 

 ville. July-September. 



P. scandens L. Thickets. O. S. August, September. 



P. cristatum Engelm. Climbing high. Harpeth hills, south 

 of Nashville. August-October. 



P. sagittatum L. Arrow-leaved tear thumb. Swampy 

 lands. O. S. July-September. 



P. arifolium L. Cumberland Plateau. September. 



BRUNNICHIA Banks. 



Brunnichia cirrhosa Bank. Grounds of the Tennessee Hos- 

 pital for the Insane, near Nashville, arovmd the fountain. Also 

 W. Tenn. May, June. 



CHENOPODIACE^ Dumort. 

 CHENOPODIUM L. 

 Chenopodium album L. Lamb's quarters. Pig weed. Cul- 



