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그루안

Hardy Rubber Tree; Gutta-percha Tree

Eucommia ulmoides · Eucommiaceae · 두충

How to spot it

Notable for the rubbery latex that appears when a leaf is torn; the only living species of the family Eucommiaceae.

Look

Leaves
Glossy green leaves, elliptic to egg-oblong (7.6-20 cm long); when torn, rubbery latex stretches out in threads.
Flowers
Small green-brown flowers appear in spring and are inconspicuous.
Fruit
Flat winged samara-like seeds 2.5-3.8 cm long appear from summer to fall.
Bark
Gray-brown bark is furrowed and cracked, and ornamental.

Where it grows

Native to
Native to central and southern China.

Sources