25 
POLYGONACEAE 
Rumex L. Dock. Sorrel. 
Patientia L. Patience Dock. Rather uncommon. 
Britannica L. Great Water Dock. Ambherst, etc., H. G. Jesup. 
Ckispus L. Yellow Dock. 
SANGUINEUS L. See Britton and Brown’s Ill. Flora of asl)..S. 
and Can., Vol. I, p. 551. 
ELONGATUS Guss. Orchard St. , Springfield, L. Andrews. 
altissimus Wood. Pale Dock. Herb. Spfld Sci. Museum. 
verticillatus L. Swamp Dock. Granby, H. G. Jesup. 
OBTUSIFOLIUS L. Bitter Dock. 
AcETOSA L. Garden Sorrel. Grass land. Common at Amherst, 
etc, 
HASTATULUS Baldw. Roadsides, Amherst, S. T. Maynard. 
ACETOSELLA L. Field or Sheep Sorrel. 
Polygonum [Tourn.] L. Knotweed. 
aviculare L. 
aviculare L. var. vegetum Ledeb. 
erectum L. 
tenue Michx. 
lapathifolium L. 
amphibium L. 
Muhlenbergii (Meisn.) Wats. Springfield, L. Andrews. 
pennsylvanicum L. 
Careyi Olney. East Amherst, etc., C. H. Hitchcock. 
Hydropiper L. Common Smartweed. 
acre HBK. Water Smartweed. 
acre HBK. var. leptostachyum Meisn. Herb. Spfld Sci. Museum, 
L. Andrews. 
ORIENTALE L. Prince’s Feather. 
PERSICARIA L. Lady’s Thumb. Common in barnyards, etc. 
hydropiperoides Michx. Mild Water Pepper. 
virginianum L. 
arifolium L. Halberd-leaved Tear-thumb. 
sagittatum L. Arrow-leaved Tear-thumb. 
CONVOLVULUS L. Black Bindweed. 
cilinode Michx. 
scandens L. Climbing False Buckwheat. 
cuspidatum Sieb. and Zucc. Springfield, L. Andrews. Two 
species, P. Sachalinense Schmidt and cuspidatum, 
have been cultivated at the Mass. Agricultural 
College for 15 years. The latter is well estab- 
lished ; the former, termed Sacaline, does not show 
a tendency to become so. Both were introduced 
from Japan as forage plants. 
