Onagrarioeus or Onagrarieous: How To spell?

The word Onagrarioeus is misspelled against Onagrarieous, an adjective meaning "Pertaining to, or resembling, a natural order of plants (Onagraceae or Onagrarieae), which includes the fuchsia, the willow-herb (Epilobium), and the evening primrose (/nothera)."