SUB-CLASS Il. DICOTYLEDONES. 179 | 
Order?. Polygonales. 
; Family Polygonacea. 
Rumex acetosella L. Sheep Sorrel. Common in dry fields 
and waste places. Calmar, Hesper. 
Rumex verticillatus L. Swamp Dock. In swamps. Re- 
ported by Fitzpatrick. 
Rumes altissimus Wood. Tall Dock. Common in low places. 
Decorah (Savage), etc. 
Rumex patientia L. Patience Dock. Common in waste 
places. Introduced. Calmar. 
Rumex brittanica L. Great Water-dock. Common in wet 
places. Calmar, etc. 
Rumex crispus L. Curled Dock. Introduced. Decorah 
(Arthur). 
| Fagopyrum fagopyrum (L.) Karst. (F. esculentum Moench.) 
Buckwheat. Not uncommonly naturalized in waste places. Ft. 
Atkinson, ete. 
_ Polygonum amphibium L. Water Persicaria. Aquatic. Re- 
ported by Fitzpatrick. ; ‘ 
Polygonum emersum (Michx.) Britt. (P. muhlenbergii S.. 
Wats.) Swamp Persicaria. Locally common in ponds. Ft. 
Atkinson. 
Polygonum incarnatum Ell. (P. lapathifolium var. incar- 
natum Wats.) Pink Persicaria. Common in wet soils. De- 
corah, Ft. Atkinson. 
Polygonum lapathifolium L. Pale Persicaria. Common in 
waste places. Introduced. 
Polygonum pennsylvanicum lL. Pennsylvania Smartweed.. 
Common in moist soil. Decorah, Hesper, Calmar. 
Polygonum persicaria L. Lady’s Thumb. Introduced weed. 
Calmar, ete. ; 
Polygonum hydropiper L. Smartweed. In moist grounds,’ 
common. Ft. Atkinson, etc. 
Polygonum virginianum L. Virginia Knotweed. Rather com- 
mon in woods. Decorah (Goddard), Canoe creek. 
Polygonum aviculare L. Doorweed. A common introduced 
door-yard weed. Calmar, Hesper, ete. 
Polygonum camporum Meisn. Prairie, Knotweed. In dry, 
sandy soil. Near Hesper. 
