152 MEMOIES FROM THE DEPARTMENT OF BOTANY OP COLUMBIA COLLEGE. 



[Plate 63.] 

 64. Polygonum scandens Linnaeus. 



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, Fl. 

 Am. Sept. 273 ; Bigelow, Fl. Bost. 95 ; Elliott, Bot. S. 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. 303; 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, CI. Bk. 

 Ed. 41, 475. 



Polygonum, dumetorum Torrey, Fl. N. Y. 2 : 147 (1834), not Linn. ; A. Gray, Man. 

 390; Chapman, Fl. S. States, 391. 



Polygonum dumetorum var. scandens A. Gray, Man. Ed. 5, 41 (1867) ; Wood, Am. 

 Bot. and Fl. 284; S. Watson, Bot. Cahf. 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 cm. 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. 



