486 PLANT LIFE OF ALABAMA. 
Polygonum virginianum I. Sp. Pl. 1:360. 1753. VIRGINIA KNOTWEED. 
EM. Sk.1:454. Gray, Man. ed. 6,442. Chap, FL 390. 
Alleghenian to Louisianian area. Ontario, southern New England, west to 
Nebraska, south to Florida, Louisiana, Arkansas, and Missouri. 
ALABAMA: From the Tennessee Valley to the Coast plain, 1 Jap woods and copses. 
Bottoms. Lauderdale County. Franklin County, Russellville. Cullman and Tal- 
ladega counties. Chilton County (/. 4. Smith). Montgomery, Clarke, Eseambia, and 
Mobile counties, Flowers green. July to September; frequent. Perennial. 
Type locality: ‘Hab. in Virginia.” 
Herb. Geol. Surv, Herb. Mohr. 
Polygonum sagittatum L. Sp. P1l.1:363. 1753, ARROW-LEAVED TEAR-THUMB, 
EU.Sk.1:458. Gray, Man. ed. 6, 442. Chap. Fl. 890, Coulter, Contr. Nat. Herb, 
2:378. 
Asta, SIBERIA. 
Canadian zone to Louisianian area. Newfoundland, T}linois, Ontario, New Eng- 
land, west to Dakota, Nebraska, Ohio Valley, Missouri, and Kansas, south to Florida 
and Texas, 
ALABAMA: Mountain region to Central Prairie belt. Low damp thickets. Clay 
County. Autanga County, Prattville (#. 4. Smith). Dallas County, Uniontown, 
Lee County. Auburn, Annual. 
‘Type locality: ‘* Hab. in Virginiae, Marilandiae madidis.” 
Herb. Geol. Surv. Herb. Mohr. 
Polygonum convolvulus L. Sp. Pl.1:364. 1753. BLACK BIND WEED. 
EM. Sk,1:459, Gray, Man, ed. 6, 442. Chap. FI. 390. Coulter, Contr. Nat. Herb. 
2:978, 
, ( 
EUROPE, MEXICO. 
Alleghenian to Louisianian area. Ontario, west to the Pacitie, most probably 
introduced; New England, throughout the Eastern States to the Gulf, Texas, and 
Mexico. 
ALABAMA: Coast plain. Waste places. Mobile County on ballast. June to 
August; frequent. Annual. 
Type locality: “ Hab. in Europae agris.” 
Herb. Geol. Surv. Herb. Mohr. 
Polygonum cristatum Engelm. & Gr. Bost. Journ. Nat. Hist. 51259. 1847. 
CLIMBING FALSE BUCK WHEAT, 
Coulter, Contr. Nat. Herb, 2: 378. 
Carolinian and Louisianian areas. Southern Georgia, Indian Territory, and Texas. 
ALABAMA: Over the State. In thickets and cultivated ground, climbing over 
bushes. Cullman, Bibb, Montgomery, and Mobile counties. A pernicious bindweed. 
The specimens from Alabama so far observed, referred to P. dumetorum and P. scan. 
dens, belong to this species, 
Type locality: ‘Margins of woods, &c. near Industry [‘Texas].” 
Herb. Geol. Surv. Herb. Mohr. 
THYSANELLA Gray, Bost. Journ. Nat. Hist, 5:21. 1845. 
One species. Southern Atlantic North America, 
Thysanella fimbriata (F1l.) Gray, Bost. Journ. Nat. Hist. 5:24. I8{5. 
FRINGED THYSANELLA, 
Polygonum fimbriatum Ell. Sk.1:583. 1817. 
El.l.e, Chap. F1. 391, 
Louisianian area. Georgia, Florida, 
ALABAMA: Upper division Coast Pine belt. Arid sandy ridges, Geneva County 
(E. A, Smith). Flowers white. September; rare. Annual. 
Type locality: “Grows on the poorest pine barrens, on the high ridges between the 
Flint and Chattahoochie rivers, along what is termed the Federal road,” 
Herb. Geol. Surv. Herb. Mohr. 
POLYGONEDLLA Michx. Fl. Bor. Am. 2:240. 1803. 
Seven species, herbs or shrubs. Southeastern North America, 6, 
Polygonella polygama (Vent.) Gray, Bost. Journ. Nat. Hist. 5:231, 187. 
OCTOBER FLOWER. 
Polygonum polygamum Vent. Jard. Cels. 665. 1800, 
Polygonella parvifolia Michx. Fl. Bor. Am. 2:241. 1803. 
