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Directly opposite the pin oak, at the point of the left 

 fork of the Walk, is a well-grown sugar maple. Some 

 people confuse the sugar maple with the Norway maple 

 from the rather close resemblance of their leaves. But 

 a glance at the bark of the tree will easily set you right. 

 The bark of the sugar maple is smooth and, on young 

 trees slightly, on old trees deeply, furrowed in long, 

 longitudinal lines. The ridges of the furrows are very 

 strong and shaggy, especially on the older trees. The 

 bark of the Norway maple is rough in regular hues, a 

 kind of hob-nail effect, very different from the smooth 

 bark of the sugar maple. A sure test of the Norway 

 maple lies in squeezing the base of its leaf. It exudes 

 a milky juice. The leaf of the sugar maple does not. 



Let us now take the northerly branch of the Walk, to 

 the right, and follow it up to the Drive, cross the Drive 

 and then follow the Walk southward as it runs beside 

 the Drive. As we enter upon it, a fine old, white mul- 

 berry greets us with outspread boughs, and at the point 

 of the left fork of the Walk here, just as it sets to turn 

 south, is common privet. Note how different its leaves 

 are from those of the Californian privet. 



As you go southward, on your right, are two Rose 

 of Sharon bushes, with a fine specimen of the large- 

 flowered syringa just behind them. Opposite the Rose 

 of Sharon bushes are two buckthorns. They are good 

 specimens of their kind, with leaves which somewhat 

 resemble the dogweed's and a bark that makes you 

 think of the Siberian pea tree or the garden cherry. The 

 leaf of the buckthorn has a rich, satin-like finish, much 

 like the beautiful sheen of the CaUfornian privet's leaf. 



