BUCKWHEAT FAMILY. 559 
12. Polygonum Careyi Olney. Carey’s 
Persicaria. (Fig. 1329.) 
Polygonum Careyi Olney, Proc. Providence Franklin 
Soc. 1:29. 1847. 
Annual, rough-glandular throughout, stem 
erect, 1°-3° tall, simple or sparingly branched 
above. Leaves oblong-lanceolate or linear-lanceo- 
late, the uppermost nearly linear, 2/-11/ long, 
short-petioled or nearly sessile, acuminate at both 
ends, hispid on the midrib, ciliate, sparingly punc- 
tate; ocreae cylindric, sparsely hispid, fringed with 
long bristles; racemes several, narrow, terminal, 
loosely-flowered, drooping, 1-214’ long; calyx pur- 
plish; stamens 5 or sometimes 8; style 2-parted to be- 
low the middle; achene lenticular, broadly ovoid or 
obovoid, 1144’7-1%4’ long, short-pointed, thick, 
smooth and shining. 
In marshes, Ontario to Rhode Island, New Jersey 
and Pennsylvania. Ascends to 2000 ft. in Pennsylva- 
nia. Alsoin Michigan. July-Sept. 
13. Polygonum setaceum Baldw. 
Bristly Persicaria. (Fig. 1330.) 
Polygonum setaceum Baldw.; Ell. Bot. S. C. & Ga. 
I: 455- 1817. 
Perennial, glabrous or strigose-pubescent 
above, stem 2°-4° high, erect, simple or spar- 
ingly branched; leaves lanceolate or oblong- 
lanceolate, 2/-9’ long, mostly short-petioled, 
acuminate at both ends, ciliate, inconspicuously 
punctate; ocreae cylindric, long, strigose, 
fringed with very long bristles; racemes few, 
terminal, 1/-214’ long, erect, linear-oblong, 
sometimes geminate, rather loosely flowered; 
calyx white or pink; stamens 8; style 3-parted 
to below the middle; achene 3-angled, oblong or 
obovoid, short, thick-pointed, 14/’/-2/’ long, 
minutely reticulated and rather dull, or smooth 
and shining. 
In swamps, southern Missouri to Louisiana, east 
to North Carolina and Florida. June-Sept. 
14. Polygonum Opelousanum Riddell. 
Opelousas Persicaria. (Fig. 1331.) 
Polygonum Ofpelousanum Riddell; Small, Bull. 
Torr. Club, 19: 354. 1892. 
Perennial, glabrous or nearly so throughout, 
stem slender, erect or ascending, sparingly or 
considerably branched, 1°-3° tall, becoming 
woody below. Leaves linear or linear-lanceo- 
late, 114’-5’ long, sessile, ciliate; ocreae cylin- 
dric, strigose, fringed with long bristles; spicate 
racemes panicled, erect, often geminate, %4/—2/ 
long, not densely flowered; calyx white, pedi- 
celled, 5-parted to below the middle; stamens 8 
or fewer, included; style deeply 3-parted; achene 
3-angled or rarely 4-angled, broadly ovoid or 
obovoid, 34’ long, black, smooth and shining, 
Missouri to Louisiana, Texas and Mexico. July- 
Sept. 
36 
