ONAGRACEOUS
Etymology
Adjective
onagraceous (not comparable)
(botany) Of or relating to the family Onagraceae of flowering plants, including the fuchsia and the evening primrose.
Source: Wiktionary
On`a*gra"ceous, On`a*gra*ri"e*ous, a. Etym: [From NL. Onagra an old
scientific name of the evening primrose (Enothera), fr. Gr. (Bot.)
Definition: Pertaining to, or resembling, a natural order of plants
(Onagraceæ or Onagrarieæ), which includes the fuchsia, the willow-
herb (Epilobium), and the evening primrose ().
Source: Webster’s Unabridged Dictionary 1913 Edition