FLORA OF WORCESTER COUNTY. 295 
POLYGONACE. 
Rum_ex, L. Dock. 
*crispus, L. Curled Dock. Common. 
*obtusifolius, L. Bitter Dock. Worcester. Prof. Eaton. 
*conglomeratus, Murray. Smaller Green Dock. Moist 
places. 
*Acetosella, L. Field Sorrel. Common. 
PoLyconum, Tourn. Knotweed. 
aviculare, L. Common in yards and waste places. 
erectum, L. Waysides, common. 
tenue, Michx. Worcester. Prof. Eaton. 
Pennsylvanicum, L. Royalston. es € 
amphibium, L. North Worcester. 
Muhlenbergii, Watson. fe 
*orientale, L. Prince’s Feather. Escaped. 
*Persicaria, L. Lady’s Thumb. G. E. Stone. 
Hydropiper, L. Common Smartweed. Common. 
acre, HBK. Water Smartweed. Wet places. 
Virginianum, L. Thickets. 
arifolium, L. Halberd-leaved Tear-thumb. Low grounds. 
sagittatum, L. Arrow-leaved Tear-thumb. “ e 
*Convolvulus, L. Black Bindweed. Worcester. 
Prof. Eaton. 
cilinode, Michx. Low grounds. Quite common. 
dumetorum, L., var. scandens, Gray. Gardner. 
Prof. Eaton. 
Facopyrum, Tourn. Buckwheat. 
*esculentum, Moench. Spontaneous. Occasional. 
POLYGONELLA, Michx. Joint-weed. 
articulata, Meisn. Mendon, Gardner. 
