noun
silk tree; Albizia julibrissin
A deciduous tree with pink, fluffy flowers. Also known as ネムノキ.
See also: ネムノキ
公園に合歓木が植えられている。
Silk trees are planted in the park.
More common name for the same tree. 合歓木 is a less frequent kanji spelling.
The kanji 合歓木 literally means 'together-rejoice tree', likely referring to the way its leaves close together at night, but the exact origin of the name is uncertain.