The flowers, which grow in large, drooping clusters, have a light purple color and bloom in May.
There are four Japanese wisterias in Oryu-ri, and they grow in a group.
The trees have height of 11m and girths of 24cm, 28cm, 172cm, and 60cm.
They stand beside a small brook in Oryu-ri and twine around hackberry that grows beside them.
Because the king enjoyed hunting with his subjects at this place, it was called Yongnim (Dragon Forest; a dragon stands for a king).
The wisterias here were called Yongdeung (Dragon Wisteria), which meant wisterias in Yongnim.
They were also dubbed Yongdeung because the thick branches looked like a dragon twisting around a tree.
There is an interesting story about these trees.
If the dried flowers of these trees are put in the pillows of newlyweds, their love will be strong; if spouses who fell out of love drink the tea of the leaves of this tree, their love will be restored.
No wonder, many couples visit this place.
These stories came from the following legend.
During the Silla Period, a peasant had two beautiful daughters.
These sisters fell in love with a man who lived next door.
Not until the man had to go to the battlefield did they learn that they were in love with the same man.
They were such good and warm-hearted sisters that both of them decided to give him up.
One day, they heard the news that the man had died in the war.
They embraced each other and cried and drowned themselves in a pond.
Note, however, that the man who was said to have been killed returned to be a nice Hwarang (Flower of Youth in Silla Dynasty - excelling in beauty, bravery, and military arts).
When he heard the sad story of the two dead sisters, he drowned himself in the pond.
At this place, hackberry started growing, and the wisterias twined around it.
The wisterias are said to talk to the hackberry about the sad love.
Since the Wisterias in Oryu-ri have been under our ancestors' care and protection and are also biologically valuable, they are designated and protected as a natural monument.