OF DENISON UNIVERSITY. 77 



312. Urtica Tourn. 



656. U. gracilis Ait. Nettle. 



Waste places everywhere. August n, 1888; July 22, 1890. 



313. Laportea Gaudichaud. 



657. L. Canadensis Gaudichaud. Wood Nettle. 



Woods, common. July 25, 1887; August 8, 1890; August 24, 

 1891. 



314. Pilea Lindl. 



658. P. pumila Gray. Richweed. 



Moist places. August 1, 1888; August 15, 1890. 



315. Boehmeria Jacq. 



659. B. cylindrica Willd. 



Woods and swamps, very variable according to location. July 

 27, 1887; July 30, 1890; August 31, 1891. 



316. PjARIETARIA Toum. 



660. P. Pennsylvania Muhl. 



Woods, common. June 6, 1888; June 25, 1890. 



LXXX. PLATANACEAE. 



317. Platanus L. 



661. P. occidentalis L. Sycamore. 



Creek banks, common. June 2, 1888; May n, 1889. 



LXXXI. JUGLANDACEAE. 



318. JUGLANS L. 



662. J. cinerea L. Butternut. 

 Rich woods, common. 



663. J. nigra L. I Hack Walnut. 

 Rich woods, common. 



319. Carya Nutt. 



664. C. alba Nutt. Shell-bark Hickory. 

 Woods and fields, common. 



