Where does “Pteridium” come from?

Pteridium (Translingual) comes from Latin -ium, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Pteridium (Translingual): genus|brackenfern, possibly the most widely distributed ferns}}

Definitions

genus|brackenfern, possibly the most widely distributed ferns}}

Ancestry of “Pteridium”, step by step

Step	Language	Word	Meaning
1	Latin	-ium	Suffix used to form abstract nouns, sometimes...
2	Latin	-ius	forming adjectives from nouns; nominative neuter...
3	Proto-Italic	-jōs	Forms comparative adjectives
4	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Latin -ium →Every word from Latin -ius →