livid pinkgill; Entoloma sinuatum
A poisonous mushroom species. The name is primarily used in mycology and mushroom foraging contexts.
イッポンシメジは毒キノコなので、絶対に食べてはいけません。
The livid pinkgill is a poisonous mushroom, so you must never eat it.
この森では秋になるとイッポンシメジが見られることがあります。
In this forest, you can sometimes see livid pinkgills in autumn.
Katakana spelling is common for mushroom names; usually written in kana.
Kanji spelling is rare and may not be widely recognized.
The name likely derives from 一本 (ippon, 'one stem') and 占地 (shimeji, a type of mushroom), but the exact origin is uncertain.