Botanical name: Quercus acutissima    Family: Fagaceae (Beech family)

Sawtooth Oak is a medium-sized deciduous tree growing to 25-30 m tall with a trunk up to 1.5 m in diameter. The bark is dark gray and deeply furrowed. The leaves are 8-20 cm long and 3-6 cm wide, with 14-20 small saw-tooth like triangular lobes on each side, with the teeth of very regular shape. The flowers are wind-pollinated catkins. The fruit is an acorn, maturing about 18 months after pollination, 2-3 cm long and 2 cm broad, bicoloured with an orange basal half grading to a green-brown tip; the acorn cap is 1.5-2 cm deep, densely covered in soft 4-8 mm long 'mossy' bristles. Sawtooth Oak is native to Himalaya to China and Indo-China, Korea, Central & S. Japan.

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The flower labeled Sawtooth Oak is ...