noun
Astilbe microphylla
A species of astilbe, a flowering plant. The Japanese name literally means 'milk mushroom skewer', possibly from the shape of the young shoots.
See also: アスチルベ
山でチダケサシを見つけた。
I found an Astilbe microphylla in the mountains.
アスチルベ is the genus name Astilbe, while チダケサシ specifically refers to the species Astilbe microphylla.
The name チダケサシ is composed of 乳茸 (chidake, 'milk mushroom') and 刺し (sashi, 'skewer'), possibly referring to the young shoots that resemble skewered mushrooms. The exact origin is uncertain.