filicology

The story

1. Proto-Indo-European · derived from*bʰel-“henbane”
2. Latin · derived fromfilic-
3. English todayfilicology

From Latin filic- (stem of filix (“fern”)) + English -ology (a variant of -logy (suffix denoting the study of a particular subject)). Filix is probably derived from Proto-Indo-European *bʰel- (“henbane”) + Latin -ix (a variant of -ex (suffix found in plant names such as cārex (“sedge”) and rumex (“sorrel”))).

Words from the same roots