]96 OHIO BIOLOaiCAL SURVEY 



Platanaceae. Plane-tree Family. 



1244. Platanus occidentalis L. Sycamore. General and abundant. 



Order, Vrticales. 



Ulmaceae. Elm Family. 



1245. Ulmus americana L. White Elm. General and abundant. 



1246. Ulmus thomasi Sarg. Cork Elm. Ciiyahoga, Lorain, Ottawa, 



Huron, Hancock, Hardin, Logan, Franklin, Lawrence, 

 Greene. 



1247. Ulmus fulva Mx. Slippery Elm. General and abundant. 



1248. Celtis occidentalis L. Common Hackberry. (Including C. cras- 



sifolia — young plants and vigorous shoots.) General and 

 abundant, but no specimens from the extreme northeastern 

 counties. 



Moraceae. Mulberry Family. 

 Subfamily, moeatae. 



1249. Morus rubra L. Red Mulberry. General. 



1250. Morus alba L. White Mulberry. Introduced. Erie, Lorain, 



Medina, Summit, Carroll, Montgomery, Clermont, Lawrence. 



1251. Toxylon pomiferum Raf. Osage-orange. From the Southwest. 



General except in the northeastern counties. 



Subfamily, cannabinatae. 



1252. Humulus lupulus L. Hop. General. Introduced. 



1253. Humulus japonieus S. & Z. Japanese Hop. A waif in Lucas 



County. 



1254. Cannabis sativa L. Hemp. Clermont, Greene, Franklin, Bel- 



mont, Coshocton, Holmes, Lucas. Introduced. 



Urticaceae. Nettle Family. 



1255. Urtica dioica L. Stinging Nettle. From Europe. Jefferson, 



Cuyahoga, Lorain. 



1256. Urtica gracilis L. Slender Nettle. General. 



1257. Urtica urens L. Small Nettle. From Europe. Lake County. 



1258. Urticastrum divaricatum (L.) Ktz. Wood Nettle. General. 



1259. Pilea pumila (L.) Gr. Clearweed. General. 



1260. Boehmeria cylindrica (L.) Sw. False Nettle. General. 



1261. Parietaria pennsylvaniea Muhl. Pellitory. General. 



