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. Pl. 1:361. 1753. Lapy’s THUMB. 
Gray, Man. ed. 6, 441. Chap. Fl. 389. Coulter, Contr. Nat. Herb. 2 :377. 
Introduced from Europe. Extensively naturalized all over the continent. 
ALABAMA: Over the State. Ditches, low places. Most frequent in the Central 
Prairiebelt. ‘TuscaloosaCounty (H..4.Smith). Dallas County, Uniontown. Mobile 
oun, ballast ground. Flowers greenish white. June to October; not common 
nnual. 
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. 
Louisianian 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. 
Polygonum mite Pers. Syn. 1:440. 1805. 
ee Sk.1:456. Gray, Man. ed. 6,441. Chap. Fl. 389. Coulter, Contr. Nat. Herb. 
2:377, 
Alleghenian to Louisianian 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 PRPPER. 
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, Contr. 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. Pl. 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. Tl. Fl. 1: 559. 
MEXICO. 
Louigianian area. Louisiana and Texas. 
AvABAMA: Coast plain. Muddy border of ponds. Mobile County, foot of Spring- 
hill. Flowers white. May, 1897; copious. Lee County, Auburn (J. 8. Earle). Not 
rare. Perennial. 
Type locality: ‘‘ Louisiana: Low prairies near Opelousas (Carpenter, 26).” 
Herb. Geol. Surv. Herb. Mohr. 
