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그루안

Mongolian oak

Quercus mongolica · Fagaceae · 신갈나무

How to spot it

Leaf bases narrow into ear-like shapes, the leaves seem clustered at the twig tips, and the backs of the cup scales bulge out.

Look

Leaves
Obovate or long elliptic, 7 to 20 cm long and (3) 5 to 10 cm wide, blunt at the tip and gradually narrowing at the base into ear-like lobes. Margins have wavy, blunt teeth, and there are 3 to 17 pairs of veins.
Flowers
Blooms in April to May; the female catkin stands upright at the top.
Fruit
The nut is oval, 6 to 25 mm long; the scales of the cup are curved and bulge on the back. It ripens in September to early October.
Bark
Bark is dark gray; one-year-old twigs are dark gray-brown.

Where it grows

In Korea
Native
Native to
Also in the Russian Far East and China; found across the Korean Peninsula.
Ecology
Grows in mountains at 100 to 1,800 m.

Sources