Sadly I had to remove this tree as it was leaning over a chook shed and could have crashed over the roof from a typhoon. Notice the distinguishing features of darkening heartwood, oozing sap and the amazing lightness of the timber for its size.
Page 114 describes an important feature of the leaves for indentification.
ケルクス属は木の幹も見ておかないと同定難しい。
アカガシはツクバネガシと雑種を作ることがあるみたい。