HABIT: Twining, occasionally erect, herbaceous perennial, to
2 m.; flowering late June-August; fruiting July-September.
SIMILAR SPECIES: Polygonum cilinode closely resembles
the common vining smartweeds P. scandens and P. convolvulus. In P.
cilinode the bases of the sheaths (ocreae) are retrorsely barbed whereas in
the other two species they are beardless. The achenes of P. cilinode are
very glossy black whereas in P. scandens and P. convolvulus the
achenes are dull.
TOTAL RANGE: Nfld. to Sask., s. to N.S., N.E., n.
NJ, PA, WV, OH, MI, WI, and MN, and in uplands to NC and TN.
STATE RANGE: There are post-1960 records from Portage and
Summit counties. A 1932 record exists from Ashtabula County.
STATE STATUS: 1980-1993: Endangered, 1994-1999: Threatened,
2000 to present: Endangered.
HABITAT: Dry woods and thickets, rocky slopes, borders of
woods, and roadsides.
HAZARDS: Roadside mowing, clearing of fencerow thickets, and
opening of the forest canopy.
RECOVERY POTENTIAL: Unknown, but possibly good. Apparently
tolerant of some disturbance.
INVENTORY GUIDELINES: Mature flowering and fruiting material
is needed for accurate identification. Avoid overcollecting.
COMMENTS: In dense shade populations are often sterile and
nearly impossible to identify.
plant may be more common than the records indicate and should be sought
throughout woodlands in northeastern Ohio.
(1914) divides this species into two varieties. Under this concept, Ohio plants
are the typical variety. The var. laevigatum Fern. is restricted to
mountainous areas of Virginia and West Virginia.
Cooperrider, T.S. 1995. The
Dicotyledoneae of Ohio. Part 2. Linaceae through Campanulaceae. Ohio State
Univ. Press, Columbus, OH. 656 pp.
Fernald, M.L. 1914. The West Virginia variety of Polygonum
cilinode. Rhodora 49: 210-216.
Ohio Department of Natural Resources
Division of Natural Areas and Preserves
Created: 1/1984 Barbara K. Andreas, James F. Burns
Database Code: SPJT.802