148 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
[PxiatE 61.] 
62. Polygonum Convolvulus Linnaeus. 
as 
Polygonum Convolvulus Linnaeus, Sp. Pl. 364 (1753); Gmelin, Syst. Nat. 2: 639; 
Willdenow, Sp. Pl. 2: 455; Michaux, F]. Bor. Am. 1: 241; Persoon, Syn. 1: 441; 
Pursh, Fl. Am. Sept. 273; Bigelow, Fl. Bost. 94; Muhlenberg, Cat. 41; Elhott, Bot. 5. C. 
& Ga. 1: 459; Barton, Comp. Fl. Phil. 1: 189; Sprengel, Syst. 2: 254; Torrey, Fl. 1: 
406, Comp. 173, Fl. N. Y. 2: 146; Beck, Bot. 303; Hooker, Fl. Bor. Am. 2: 131; Meis- 
ner, Monog. 62 and in DC. Prodr. 14: 135; Darlington, Florula Cest. 49, Fl. Cest. 252; 
Eaton & Wright, N. A. Bot. Ed. 8, 368; A. Gray, Man. 390; Wood, Cl. Bk. Ed. 41, 475. 
Am. Bot. and Fl. 288; Chapman, FI. 8. States, 390; Darby, Bot. 8. States, 491; 5S. Wat- 
son, Bot. Calif. 2: 15; Reade, Pl. Bermud. 68; Behr, Fl. San Francisco, 276; Greene, FI. 
Francis. 138. 
Annual, glabrous but scurfy, of a dull green or pale green color. Stem prostrate, 
slender, ascending or twining, 1-12 dm. long, branched from near the root and usually 
also above or sometimes simple, the internodes of the older branches greatly elongating ; 
leaves broadly or narrowly ovate or ovate-sagittate, the uppermost nearly sagittate, 1.5— 
6 em. long, .56-4 em. broad, acuminate at the apex, cordate or truncate at the base, some- 
what undulate and crisped, very slightly ciliate; petioles slender, 1-5 cm. long; ocreae 
funnelform, oblique, 2-4 mm. long, acute, rough on the edges; inflorescence consisting 
of axillary clusters or racemes; flowers several in a cluster; racemes simple, 1-6 cm. 
long, loosely flowered, interrupted; pedicels very slender, 2-3 mm. long, reflexed or 
deflexed; calyx green, at length 3.5-4 mm. long, five-parted to below the middle or to 
near the base, closely investing the fruit, the segments oblong, obtuse, the three outer ones 
sometimes keeled; stamens eight, included; style about .4 mm. long, entire, the stigma 
three-cleft, somewhat exserted; achene triquetrous, 3.5 mm. long, broadly obovoid or 
oblong-obovoid, short-pointed, black, granular, rather dull. 
Throughout North America, except the extreme north. Naturalized from Europe. 
