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그루안

Bamboo-leaf oak

Quercus myrsinifolia · Fagaceae · 가시나무

How to spot it

The similar chamgasinamu has hairs on the leaf underside from the start and is coated with white powder, whereas this species is distinguished by a whitish-gray, hairless underside.

Look

Leaves
Leaves are long elliptic-lanceolate, 7-12 cm long, with fine teeth on the upper half or margin; 11-15 pairs (usually 12) of side veins; the underside is whitish gray and hairless.
Flowers
Flowers in April-May; monoecious.
Fruit
The cup is hemispherical with 6-7 rings; the nut is egg-shaped-elliptic to elliptic, 1.5-1.7 cm long, and matures in the same year.
Bark
Bark is gray-black and smooth.

Where it grows

In Korea
Native
Native to
Found on Jeju-do and Jindo in Jeollanam-do, Korea; also in Japan and China.
Ecology
Grows well in relatively fertile sandy loam and tolerates shade and dry places. It is weak in cold, overwintering at 5 degrees C or above, and is strong against salt wind and in sprouting.

Sources