noun
Mycena lux-coeli; bioluminescent mushroom
A species of bioluminescent mushroom found in Japan. The name literally means 'shiitake log lamp mushroom'.
シイノトモシビタケは、夜になると淡い緑色に光るキノコです。
Mycena lux-coeli is a mushroom that glows pale green at night.
この森では、梅雨の時期にシイノトモシビタケが見られます。
In this forest, you can see Mycena lux-coeli during the rainy season.
The Japanese name is composed of 椎 (shii, a type of evergreen oak), の (possessive particle), 灯火 (tomoshibi, lamp/light), and 茸 (take, mushroom), referring to its bioluminescence and habitat on dead shii trees. The exact derivation is uncertain beyond this descriptive compound.