two changes at once
wudshia returns nothing in a plant list
Search for woodsia instead.
two changes at once
Two things have shifted at once here, the vowel and the ending, and that is usually enough to make a catalogue search fail outright rather than offer a suggestion. The reliable way back is the surname. Nurseries and floras file this fern under Woods with three letters added, so typing woods into a search box and reading what comes back beats trying to spell the whole word from memory.
The class
Two separate decisions about the letters, both made at once.
Same name
The name