two changes at once
sheilantes has three problems
The opening is ch, the middle keeps its h, and the word is cheilanthes.
two changes at once
Strip both h's out and soften the first sound, and what is left reads like an English name rather than a Greek one. That is the pull working on this spelling: sheilantes looks like something you could pronounce on sight, and the real word does not. Cheilos and anthos are the two halves, a lip and a flower, and both halves keep the h that marks them as Greek.
The class
Two separate decisions about the letters, both made at once.
Same name
Other spellings recorded for cheilanthes
The name