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microcarpa generally has five leaflets, but sometimes has 

 five and seven. You will find a good pignut, in this 

 area, near the old Block House. You will find it easily 

 by referring to the map. The leaf-stem of the pignut 

 (porcina) is generally smooth — a distinguishing feature 

 of the tree. 



Juglans cinerea. (Butternut. White Walnut. No. 

 49.) Enter the Park at One Hundred and Tenth Street 

 and Central Park West and, after going down the series 

 of steps, take the left-hand fork of the Walk and go 

 east. This Walk runs almost parallel with One Hun- 

 dred and Tenth Street. Follow the Walk until you 

 come to a large rock mass which is close to the left of 

 the Walk. Just before you come to this rock mass, you 

 will pass two hackberries, on the left of the Walk. The 

 hackberries are easily recognized by the warty ridges 

 and knobs on the lower parts of their trunks. Directly 

 back (north) of these two hackberries, close by the 

 rock, stands the butternut. It was once a much better 

 tree than it is now. You can identify it by its compound 

 leaves made up of from eleven to seventeen, round- 

 based, oblong-lanceolate leaflets, set in pairs (or nearly 

 so), along the sticky, gummy leaf -stalks. The leaflets 

 are serrate, downy on the undersides, and have an oily 

 feeling to the touch. In their very sticky and gummy 

 leaf-stalks and oily leaflets, they differ from the leaves 

 of the black walnut. Notice, too, the light gray fur- 

 rowed bark that makes you think of the trunk of a 

 chestnut, so different from the heavy looking, dark 

 bark of the black walnut. The fruit is of a truth a but- 

 ternut, with a husk, oily and sticky in the extreme, 



