92 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
[PLATE 33.] 
33. Polygonum Virginianum Linnaeus. 
Polygonum Virginianum Linnaeus Sp. Pl. 360 (1753); Gmelin, Syst. Nat. 2: 637; 
Willdenow, Sp. Pl. 2: 442; Michaux, Fl. Bor. Am. 1: 238; Persoon, Syn. 1: 440; 
Muhlenberg, 40; Pursh, Fl. Am. Sept. 270; Bigelow, Fl. Bost. 167; Elliott, Bot. 5. C. 
and Ga. 1: 454; Eaton, Man. 371; Barton, Comp. FI. Phil. 1: 187; Sprengel, Syst. 2: 
259; Torrey, Fl. 1: 403, Comp. 172, Fl. N. Y. 2: 151; Beck, Bot. 301; Hooker, Fl. Bor. 
Am. 2: 132; Meisner, Monog. 81 and in DC. Prodr. 14: 112; Darlington, Florula Cest. 
48, Fl. Cest. 248; Eaton & Wright, N. A. Bot. Ed. 8, 367; A. Gray, Man. 389; Wood, 
Cl. Bk. Ed. 41, 475, Am. Bot. and Fl 283; Chapman, FI. 8. States, 390; Darby, Bot. 
5. States, 489. 
Polygonum muticum Moench, Suppl. 266 (1802). 
Persicaria Virgimana Gaertner, Fruct. et Sem. 2: 180. t. 179 (1802). 
Annual, slender, nearly glabrous or strigose throughout. Stem erect or reclining, 
3-13 dm. long, virgate, simple or virgatedly branched especially above; leaves ovate, 
elliptic-ovate or ovate-lanceolate, 3-16 cm. long, 1-8 em. broad, acuminate, short-petioled, 
acute at the base, sparingly ciliate, the upper surface dark green, the lower lighter; 
petioles 1-2.5 cm. long; ocreae cylindric, .5-1.5 em. long, strigose, fringed with short 
bristles; inflorescence terminal and axillary, consisting of much elongated spicate racemes; 
racemes 1-6 dm. long, naked, much interrupted, virgate; ocreolae funnelform, 2 mm. 
long, fringed with short bristles; pedicels 3 mm. long, somewhat reflexed, conspicuously 
articulated at the base of the calyx; calyx greenish, 4-5 mm. long, unequally four-parted 
to the middle or to the base, somewhat curved; stamens five, included; style 4 1m. 
long, two-parted to the base, long exserted, the segments reflexed and curled at the tips; 
achene lenticular, 3.5-4 mm. long, ovoid-oblong, dark brown or cream-colored, smooth 
and shining. 
Noya Scotia to Minnesota, south to Nebraska, Texas and Florida. 
