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Thuya gigantea. (Giant Arbor Vitw. No. 63.) 

 Take the path that leads off to southwest from the 

 old Block House, crowning the magnificent battlements 

 of rock due south from the Gate at Seventh Avenue and 

 One Hundred and Tenth Street, past a good-sized shag- 

 bark hickory (bark very shaggy on the tree and note 

 the buds) and a hop-hornbeam just beyond it, until you 

 come to a junction of Walk a short distance, twenty-five 

 or thirty feet, to the southwest. In the westerly corner 

 of this junction you will find the giant arbor vitse. It 

 differs from our common native arbor vitas {Thuya 

 Occidentalis) in having its scale-like leaves larger and 

 more pointed. 



While you are here, swing around to your left (east) 

 and have a look at the fine old pignut hickory a little 

 off to the south of the Walk. Note its smooth leaf- 

 stems. A sturdy little black haw stands just a little to 

 the southeast of the pignut. The black haw has round- 

 ish, plum-like leaves with fine wing-like flanges (dull 

 crimson or faintly reddish) along the edges of the leaf- 

 stems. 



