16 

 SALICACEAE. 



Salix longifolia L. 



(S. Fluviatilis Nutt.) 



Two or three stunted trees near the station. This is 

 the common willow along the banks of the Mississippi. 



ULMACEAE. 



Celtis Mississipiensis Bose. 



A few stunted trees on the ridges. 

 Celtis pnmila Pursh. 



Occurring occasionally in ground that has been cul- 

 tivated. 



URTICACEAE. 



Urtica dioiea L. 



( chamaedryoides Pursh. ) 

 Parietaria Floridana Nutt. 



POLYGONACEAE. 



Polygonum opelousanum Ridd. 



Collected by Prof. S. M. Tracy at Cameron. Collected by 

 the writer "in St. Tammany parish. 

 Polygonum punctatum Ell. 



(P. acre H. B. K.) Over the whole State. 

 Polygonum hydropiperoides Michx. 



(P. mite Pers.) All over the State. 

 Polygonum aviculare L. 



Rare in Cameron parish. Common almost everywhere. 

 Polygonum convolvulus L. 



Common over the State. 

 Rumex verticillatus L. 



Growing in ditches. 



