152 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
[PLATE 63. ] 
64. Polygonum scandens Linnacus. 
“” 
Polygonum scandens Linnaeus, Sp. Pl. 364 (1753); Gmelin, Syst. Nat. 2: 639; 
Michaux, Fl. Bor. Am. 1:.240; Persoon, Syn. 1: 441; Muhlenberg, Cat. 41; Pursh, FI. 
Am. Sept. 273; Bigelow, Fl. Bost. 95; Elliott, Bot. 8. C. & Ga. 1: 459; Eaton, Man. 
317; Barton, Comp. Fl. Phil. 1: 190; Sprengel, Syst. 2: 254; Torrey, Fl. 1: 406, Comp. 
173; Beck, Bot. 803; Meisner, Monog. 64 and in DC. Prodr. 14: 135; Darlington, 
Florula Cest. 49, Fl. Cest. 252; Eaton & Wright, N. A. Bot. Ed. 8, 368; Wood, Cl. Bk. 
Hd. 41, 475. 
Polygonum dumetorum Torrey, Fl. N. Y. 2: 147 (1834), not Linn.; A. Gray, Man. 
390; Chapman, FI. 8. States, 391. 
Polygonum dumetorum var. scandens A. Gray, Man. Ed. 5, 41 (1867); Wood, Am. 
Bot. and Fl. 284; 8. Watson, Bot. Calif. 2: 15; Coulter, Man. Bot. Rocky Mt. Reg. 521. 
Perennial, rather stout, glabrous, more or less scurfy throughout. Stem extensively 
twining, 6-4 dm. long, sparingly or diffusely branched, somewhat channeled, roughened 
on the ridges; leaves ovate or oblong-ovate, 1-12 em. long, .8-7 cm. broad, cordate, 
acuminate, sparingly scabrous or eroded on the margins, papillose, long-petioled except 
those on the young branches; petioles 1-10 cm. long, rough on the edges; ocreae fun- 
nelform, oblique, 2-4 mm. long, acute, rough on the ridges; inflorescence consisting 
mostly of axillary clusters and racemes; racemes 3-24 cm. long, interrupted, bearing 
many large leaves; pedicels slender, 7 mm. long, articulated near the base; calyx 
greenish-yellow, at length 1 cm. long, five-parted to beyond the middle, the segments 
ovate, obtuse, the three outer ones keeled and conspicuously winged in fruit; stamens 
eight, included ; style .2 mm. long, entire, the stigma somewhat three-cleft, included ; 
achene triquetrous, 3.5-4.5 mm. long, oblong, often enlarged about the middle, rather 
blunt at both ends, black, smooth and shining. 
From Nova Scotia west to the Rocky Mountains, south to Florida and Louisiana. 
