76 BULLETIN OF THE LABORATORIES 



LXXIX. URTICACEAE. 



306. Ulmus L. 



647. U. fulva Michx. Slippery Elm. 



Generally distributed over the county. April 2, 1888; April 8, 

 1889; April 1, 1891. 



648. U. Americana L. American or White Elm. 



Found everywhere. April 7. 1888; January 20, 1890; April 1, 

 1891. 



649. U. racemosa Thomas. Cork Elm. 

 Herbarium of Dr. F. O. Jacobs. 



307. Celtis Tourn. 



650. C. occidentalis L. Sugarberry. Hackberry. 

 Generally distributed. There are several trees along Broadway, 



Granville. May 6, 1890. 



308. Cannabis Tourn. 



651. C. sativa L. Hemp. 



Roadsides and waste places; Newark and Alexandria. 



309. Humulus L. 



652. H. Lupulus L. Common Hop. 



Alluvial soil, rare; Canal bank, Toboso; creek bank, Alexandria. 

 August 25, 1890. 



310. Maclura Nutt. 



653. M. aurantiaca Nutt. Osage Orange. 

 Frequently escaped into thickets from cultivation. 



311. Morus Tourn. 



654. M. rubra L. Red Mulberry. 



Woods, rather common. May 28, 1888; June 4, 1889; May 26, 

 1890. 



655. M. alba L. White Mulberry. 



Roadsides, fields, etc., somewhat common. June 1, 1890; May 

 14, 1891. 



