Polygonum scandens L., false buckwheat, crested buckwheat 
[Fallopia scandens (L.) Holub; S: incl. var. cristatum 
(Engelm. & A. Gray) Gleason; G: incl. var. dumetorum 
(L.) Gleason; M: incl. Polygonum cristatum Engelm. & 
A. Gray] (the present, conservative treatment follows 
that of Horton (1972), but readers should note that 
there is disagreement as to the treatment of this 
complex, and as pointed out Mitchell and Dean (1978), 
the situation requires further study), p. 597 
P. setaceum Baldwin ex Elliott, water pepper [Persicaria setacea 
(Baldwin ex Elliott) Small; S: Polygonum 
hydropiperoides var. setaceum (Baldwin ex Elliott) 
Gleason; M: incl. var. interjectum Fern.] (Horton, 1972; 
McDonald, 1980), p. 594 
. tenue Michaux, slender knotweed, p. 587 
. Virginianum L., Virginia knotweed, jumpseed [Persicaria 
virginiana (L.) Gaertner], p. 596 
var. glaberrimum (Fern.) Steyerm. 
var. virginianum 
a a-] 
RUMExX, dock, sorrel 
+Rumex acetosella L., sheep sorrel, red sorrel, field sorrel, sour 
dock (note that the application of infraspecific epithets 
to North American material is presently uncertain, 
Mitchell and Dean (1978) and den Nijs (1983) 
indicated that most North American specimens should 
be referred to as ssp. angiocarpus (Murb.) Murb., but 
other infraspecific taxa may also be present), p. 577 
R. altissimus Alph. Wood, pale dock, peach-leaved dock, tall dock, 
578 
p. 
+R. conglomeratus Murray, p. 581 
¢R. crispus L., curly dock, sour dock, yellow dock, p. 580 
*oR. cristatus DC., crested dock (Shildneck et al., 1981; 
Miihlenbach, 1983) 
**R. dentatus L. (Miihlenbach, 1979) (note that the scanty North 
American materials have not been determined at the 
infraspecific level yet) 
R. hastatulus Baldwin ex Elliott, wild sorrel, sour dock, heartwing 
sorrel, p. 578 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
