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그루안

Korean rhododendron

Rhododendron mucronulatum · Ericaceae · 진달래

How to spot it

Flowers open before the leaves, and the underside of the leaf is densely covered with scales.

Look

Leaves
Long elliptic with a pointed tip, 4 to 7 cm long and 1.5 to 2.5 cm wide, without teeth. There are a few scales on the upper surface and dense scales beneath; the leaf stalk is 6 to 10 mm long.
Flowers
Blooms from late March to April before the leaves. The corolla is widely funnel-shaped, 3 to 4.5 cm across, purplish-red or pale red, with fine hairs on the outside.
Fruit
The capsule is cylindrical, 2 cm long, maturing in November.
Bark
The stem is light brown with scales.

Where it grows

In Korea
Native (Korean Peninsula)
Native to
Also found in China, Inner Mongolia, Japan and the Russian Far East; in Korea it grows nationwide (from lowlands to subalpine).
Ecology
Grows in lowlands, high mountains, stream sides, on rocks, on barren ground and in fertile ground alike; strongly tolerates wind but is weak against air pollution, so it grows poorly in city centers. It resprouts strongly.

Sources