VASCULAE PLANTS OP OHIO 183 



989. Persiearia hydropiperoides (Mx.) Small. Mild Smartweed. 



General. 



990. Persiearia hydropiper (L.) Opiz. Water Smartweed. General. 



Fi-om Europe. 



991. Persiearia punctata (Ell.) Small. Dotted Smartweed. General. 



992. Persiearia orientalis (L.) Spaeh. Prince 's-feather. Lucas, 



Montgomery, Franklin, Hocking, Meigs, Scioto. Native of 

 India. 



993. Tovara virginiana (L.) Raf. Virginia Knotweed. General. 



994. Polygonum aviculare L. Doorweed. General and abundant. 



995. Polygonum buxiforme Small. Shore Knotweed. Wayne County. 



996. Polygonum erectum L. Erect Knotweed. Lake, Richland, 



Franklin, Muskingum, Morgan, Hocking, Athens, Meigs, 

 Warren, Clermont. 



997. Polygonum ramosissimum Mx. Bushy Knotweed. Lake, Frank- 



lin. Waifs from the West. 



998. Polygonum tenue Mx. Slender Knotweed. Erie County. 



Order, Piperales. 



Saururaceae. Lizard 's-tail Family. 



999. Saururus cernuus L. Lizard 's-tail. General. 



Subclass, CALYCIPLOEAE. 



Order, Bosales. 



Rosaceae. Rose Family. 

 Subfamily, eosatae. 



1000. Geum rivale L. Purple Avens. Champaign, Geauga. 



1001. Geum canaadense Jacq. White Avens. General. 



1002. Geum flavum (Port.) Bickn. Cream-colored Avens. No speci- 



mens. 



1003. Geum virginianum L. Rough Avens. General. 



1004. Geum striatum Ait. Yellow Avens. Eastern half of state; also 



in Preble County. 



1005. Geum vernum (Raf.) T. & G. Spring Avens. General. 



1006. Dasiphora fruticosa (L.) Rydb. Shrubby Cinquefoil. Rather 



general. 



1007. Potentilla paradoxa Nutt. Bushy Cinquefoil. Brie County. 



1008. Potentilla argentea L. Silvery Cinquefoil. Portage, Cuyahoga, 



Erie, Licking. 



