67 



8. BcEHMERIA, Jacq. 



cylindrica, WiUd. (False Nettle.) 



Moist ground along Brandywine. Common. Jul}*. 



Sub-Order 4.— CAXNABIXE.E. 



9. Cannabis, Tourn. 



sativa, L. (Hemp.) 



Waste places. Escaped from cultivation. June. 

 Persia. 

 10. Humulus, L. 



lupulus, L. (Hop.) 



Banks of streams ■ Brandywine, ka. Not rare. July. 



Order 85.— PLATANACEJE. 105. 



1. Platanus, 1 L. 



occidentalis, L. (Buttonwood. Plane-tree.) 

 Banks of streams, &c. Frequent. April. 



Order. 86.— JUGLANDACEJE. 106. 



1. JUGLANS, L. 



cinerea, L. (White Walnut. Butternut.) 

 Bich rocky woods. Frequent. May. 



nigra, L. (Black Walnut.) 



Bich woods and fencerows. Frequent. May. 



2. Carta, Xutt. 



alba, Xutt. (Shellbark Hickory.) 



Low woods along the northern county line. Bare 

 elsewhere. May. 

 tomentosa, (Mocker-nut. White-heart Hickory.) 



Bich woods. Common. May. 

 microcarpa, Nutt. (Small-fruited Hickory.) 



Moist woods. Frequent. May. 

 glabra, Torr. (Pignut. Broom Hickory.) 



Low woods. Frequent. May. 



1 This tree has been for several years subject to a loss of foliage, which 

 is said, by an observer in Wilmington, to be occasioned by the depreda- 

 tions of a small caterpillar, which perforates the dilated base of the pe- 

 tiole and destroys the young bud which it encloses. 



