noun
Cyathea mertensiana (species of tree fern)
A specific species of tree fern native to Japan. Used in botanical contexts.
マルハチは小笠原諸島に自生する木生シダの一種です。
Maruhachi is a species of tree fern native to the Ogasawara Islands.
The name マルハチ (maruhachi) likely derives from the shape of the cross-section of the stem, which resembles the symbol ㊇ (a circle with the number 8 inside). The exact origin is uncertain.