82 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE, 
[Pate 28. ] 
28. Polygonum hirsutum Walter. 
Polygonum hirsutum Walter, Fl. Car. 132 (1788); Michaux, Fl. Bor. Am. 1: 239; 
Persoon, Syn. 1: 440; Muhlenberg, Cat. 41; Pursh, Fl. Am. Sept. 270; Elliott, Bot. 8. 
CO. and Ga. 1: 454; Sprengel, Syst. 2: 253; Meisner, Monog. 79 and in DC. Prodr. 14: 
103; Eaton & Wright, N. A. Bot. Ed. 8, 369; Wood, Cl. Bk. Ed. 4, 475; Am. Bot. and 
FL. 283; Chapman, FI. 8. States, 389; Darby, Bot. 5. States, 489. 
Polygonum hirsutum var. dasyphyllum Meisner, in DC. Prodr. 14: 103 (1856). 
Perennial, conspicuously hispid with reddish or brown hairs. Stem erect or decum- 
bent and creeping, 83-9 dm. long, simple or branched either above or from the creeping 
base, more or less densely clothed with spreading hispid hairs, becoming woody below; 
leaves lanceolate, 3-10 em. long, .6-2 em. broad, cordate or subcordate, acute at the apex, 
the upper ones acuminate, more or less hispid on both surfaces, ciliate, inconspicuously 
punctate, subsessile; ocreae cylindric, 1-1.5 em. long, very hispid, fringed with many but 
rather short bristles; inflorescence paniculate, strict, the ultimate divisions ending in 
spicate more or less geminate racemes, sometimes nearly simple; racemes erect, 1.5—6 em. 
long, narrow or almost linear, rather loosely flowered, sometimes interrupted; ocreolae 
funnelform, oblique, 2 mm. long, acute, fringed with a few bristles; pedicels about 3 mm. 
long, angled; calyx 2.5-3 mm. long, white, five-parted to below the middle, the segments 
oblong, obtuse; stamens eight or fewer, included; style three-parted to below the middle, 
1 mm. long, often shorter; achene triquetrous, 2 mm. long, broadly obovoid or nearly 
oblong, short-pointed, black, smooth and shining. 
Wet soil, Florida and Georgia. 
Polygonum hirsutum glabrescens Meisner. 
Polygonum hirsutwm var. glabrescens Meisner, in DC. Prodr. 14: 103 (1856). 
More slender than the species. Stem erect, 2-4 dm. long, glabrous or sparingly 
strigose especially about the nodes; leaves narrowly lanceolate, 3-6 em. long, .5-1 em. 
broad, glabrous except the midrib and a few straggling hairs on the upper and lower 
surfaces, obtuse; ocreae hispid. 
Lake Jacnony and Tallahassee, Florida. 
