167 



191. Ulmus americana L. American or White Elm. 



Abundant. 



192. U. fulva Michx. Slippery Elm. Red Elm. 



Not many trees seen. 



193. Celtis occidentalis L. Hackberry. Sugar Berry, 



A few trees noted. 



194. Morus rubra L. Red Mulberry. 



Found in woods; not rare. 



195. M. alba tartarica. Russian Mulberry. 



An abundant escape in waste land east of the lake. 



196. Toxylon pomiferum Raf. Osage Orange. {Madura anranUaca Nutt.) 



Used abundantly for hedges. 



197. Humulus lupulus L. Hop. 



Found growing in low rich grounds. 



198. Cannabis sativa I^. Hemp. 



A common escape on commons near Warsaw. 



199. Urtica gracilis Ait. Slender Nettle. 



In chimps in waste places. 



200. llrticastrum divaricatum (L.) Kuntze. Wood Nettle. Laportea cana- 



densis Gaud. 



Abundant in low woods. 



201. Adicea pumila (L.) Raf. Clear Weed. Rich Weed. {Pilea ptimila 



Gray.) 



Abundant in moist places. 



202. Boehmeria eylindrica (L.) Willd. False Nettle. 



Abundant in moist woods. 

 208. Parietaria pennsylvanica Muhl. 

 Not particularly abundant. 



204. Commandra umbellata (L.) Nutt. Bastard Toad Flax. 



Found growing abundantly in dry places, along the road east 

 of the lake. 



205. Asarum canadense L. Wild Ginger. 



Rather common in shady woods. 



206. Aristolochia serpentaria L. Virginia Snake Root. 



Scattered in loose soil of forests. 



207. Rumex acetosella L. Field Sorrel. Red Sorrel. 



A common nuisance in sandy fields. 



