BUCKWHEAT FAMILY. 485 



ALABAMA : Coast plain. Shaded swamps. Mobile County, swampy alluvial for- 

 est on the old telegraph road, copious. Hale County, Greensboro. Flowers bright 

 pink. October. Annual. 



Type locality: West Indies. 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum persicaria L. Sp. PI. 1 : 361. 1753. LADY'S THUMB. 



Gray, Man. ed. 6, 441. Chap. Fl. 389. Coulter, Contr. Nat. Herb. 2:311. 



Introduced from Europe. Extensively naturalized all over the continent. 



ALABAMA: Over the State. Ditches, low places. Most frequent in the Central 

 Prairiebelt. Tuscaloosa County (E. A. Smith). Dallas County, Uniontown. Mobile 

 County, ballast ground. Flowers greenish white. June to October; not common 

 Annual. 



Type locality: "Hab. in Europae cultis." 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum setaceum Baldwin ; Ell. Sk. 1 : 455. 1817. BRISTLY PERSICARIA. 



Chap. Fl. 389. Coulter, Contr. Nat. Herb. 2 : 377. 



Louisiauian area. Georgia to Texas and Arkansas. 



ALABAMA : Central Prairie belt. Ditches, borders of ponds. Montgomery County. 

 Lee County, Auburn (Baker <)' Earle). Flowers white. October; rare. Annual. 



Type locality : " In clayey soils, Savannah ; St. Marys, Ga. Baldwin.''" 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum hydropiperoides Michx. Fl. Bor. Am. 1 : 239. 1803. 



MILD WATER PEPPER. 



Polytjonum mite Pers. Syn. 1 :440. 1805. 



Ell. Sk. 1 : 456. Gray, Man. ed. 6, 441. Chap. Fl. 389. Coulter, Contr. Nat. Herb. 

 2:377. 



Alleghenian to Louisianiau area. New Brunswick, Ontario ; New England, west 

 to Nebraska; south to Florida, Texas, Arkansas, and Missouri. 



ALABAMA : All over the State, border of swamps, shallow ponds, ditches. Most 

 abundant from the Central Pine belt to the coast. Montgomery, Escambia, and 

 Mobile counties. Flowers white. July to October; abundant. Perennial. 



Type locality: "Hab. in Pennsylvania, Virginia, Carolina." 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum punctatum Ell. Sk. 1 : 455. 1817. SMART WEED. WATER PEPPER. 



Polygonum acre H. B. K. Nov. Gen. 2 : 179. 1817. Not Lam. 



Ell. Sk. 1. c. Gray, Man. ed. 6, 442. Chap. Fl. 389. Coulter, Coiitr. Nat. Herb. 2 : 377. 

 Griseb. Fl. Brit. W. Ind. 161. 



Alleghenian and Louisianian areas. Ontario; New England west to Dakota and 

 Nebraska, south to Florida and Texas. 



ALABAMA: Over the State. Wet places. Flowers white. July to October; com- 

 mon. Perennial. 



Type locality: "In ditches and shallow ponds [South Carolina and Georgia]." 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum hydropiper L. Sp. PI. 1 : 361. 1753. WATER PEPPER. 



Gray, Man. ed. 6, 441. Coulter, Contr. Nat. Herb. 2 : 377. 



EUROPE. 



Alleghenian and Louisianian areas. Throughout the continent. Mostly natural- 

 ized from Europe 



ALABAMA: Low wet places. Dallas County, Uniontown. June; rare. Perennial. 



Type locality: " Hab. in Europae subhumidis." 



Herb. Geol. Surv. Herb. Mohr. 



Polygonum opelousanum Riddell ; Small, Bull. Torr. Club, 19 : 354. 1892. 



OPELOUSAS PERSICARIA. 



Polygonum opelousanum Riddell, Cat. Fl. Lud. in N. Orl. Med. & Surg. Journ. 1852. 

 Name only. 



Britt. & Br. 111. Fl. 1 : 559. 



MEXICO. 



Louisianian area. Louisiana and Texas. 



ALABAMA : Coast plain. Muddy border of ponds. Mobile County, foot of Spring- 

 hill. Flowers white. May, 1897; copious. Lee County, Auburn (>. S. Earle). Not 

 rare. Perennial. 



Type locality: " Louisiana: Low prairies near Opelousas (Carpenter, 26)." 



Herb. Geol, Surv. Herb. Mohr. 



