182 OHIO BIOLOGICAL SUEVEY 



970. Rnraex patientia L. Patience Dock. From Europe. No speci- 



mens. 



971. Riimex britannica L. Great Water Dock. Williams, Erie, Co- 



shocton, Licking, Franklin, Hocking, Champaign. 



972. Rumex crispus L. Curled Dock. Naturalized from Europe. 



General and abundant. 



973. Rumex conglomeratus Murr. Clustered Dock. Lake County. 



From Europe. 



974. Rumex obtusifolius L. Broadleaf Dock. Naturalized from 



Europe. General and abundant. 



975. Rumex acetosella L. Sheep Sorrel. General and abundant. 



From Europe. 



976. Pleuropterus zuccarinii Small. Japanese Knotweed. Cuyahoga 



County. From Japan. 



977. Tiniaria convolvulus (L.) W. & M. Black Bindweed. General. 



Naturalized from Europe. 



978. Tiniaria scandens (L.) Small. Climbing False Buckwheat. 



General. 



979. Tiniaria dumetorum (L.) Opiz. Copse False Buckwheat. From 



Europe. (Erie, Ottawa — Moseley Herbarium.) 



980. Tracaulon arifolium (L.) Raf. Halberd-leaf Tear-thumb. North- 



ern part of state as far south as Auglaize and Belmont 

 Counties. 



981. Tracaulon sagittatum (L.) Small. Arrow-leaf Tear-thumb. 



General. 



982. Fagopyrum fagopyrum (L.) Karst. Buckwheat. From Europe. 



General. 



983. Persicaria amphibia (L.) S. F. Gr. Water Persicaria. Summit, 



Fairfield, Ottawa, Stark, Franklin, Clark. 



984. Persicaria muhlenbergii (Wats.) Small. Swamp Persicaria. 



Northern half of state to Shelby and Perry Counties. 



985. Persicaria lapathifolia (L.) S. F. Gray. Pale Persicaria. Gen- 



eral. Naturalized from Europe. 



986. Persicaria pennsylvanica (L.) Small. Pennsylvania Persicaria. 



General and abundant. 



987. Persicaria careyi (Olney) Greene. Carey's Persicaria. Erie 



County. 



988. Persicaria persicaria (L.) Small. Lady's-thumb. General and 



abundant. Naturalized from Europe. 



