noun
goldthread; Coptis japonica
A perennial herb of the buttercup family, native to Japan, with small white flowers and yellow rhizomes used in traditional medicine.
黄連は漢方薬の原料として栽培されています。
Goldthread is cultivated as a raw material for traditional Chinese medicine.
山で黄連の花を見つけました。
I found goldthread flowers in the mountains.
The name 黄連 (おうれん) literally means 'yellow link/chain', referring to the yellow color of its rhizomes. The exact historical derivation is uncertain.