bolete
Refers to mushrooms of the bolete family, typically with pores instead of gills. In everyday Japanese, イグチ is the most common written form.
In autumn, you can pick lots of boletes in the mountains.
Katakana spelling is standard for this mushroom name; usually written in kana.
Ateji kanji spelling; rarely used in practice.
The origin is uncertain. The kanji 猪口 (literally 'boar mouth') is ateji and does not reflect the meaning.