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그루안

English Oak

Quercus robur · Fagaceae · 유럽참나무

How to spot it

Ear-like lobes at the leaf base near the short petiole; acorns on long stalks.

Look

Leaves
Leaves have rounded lobes, with ear-like projections at the base near the short petiole.
Flowers
Male and female flowers appear as the leaves emerge. Male flowers are slender, greenish-yellow, hanging catkins; female flowers sit 3 to 4 together in the leaf axils.
Fruit
Elongated ovoid acorns on long stalks; the cup covers about a quarter to a third of the acorn. They ripen in one growing season.
Bark
Gray-brown to black bark becomes deeply fissured with age.

Where it grows

Native to
Forest regions from the British Isles to the Caucasus in Europe.
Ecology
Found in forests, forest edges, meadows and roadsides; acorns feed birds and mammals.

Sources