Is it ensure, insure, or assure?
1777, "the plant life of a region or epoch," from Latin Flora, Roman goddess of flowers, from flos (genitive floris) "flower," from *flo-s-, Italic suffixed form of PIE *bhle- "to blossom, flourish" (cf. Middle Irish blath, Welsh blawd "blossom, flower," Old English blowan "to flower, bloom"), extended form of *bhel- (3) "to thrive, bloom," possibly identical with *bhel- (2) "to blow, swell" (see bole). Used as the title of descriptive plant catalogues since 1640s, but popularized by Linnaeus in his 1745 study of Swedish plants, "Flora Suecica."
flora flo·ra (flôr'ə)
n. pl. flo·ras or flo·rae (flôr'ē')
Plants considered as a group.
The microorganisms that normally inhabit a bodily organ or part.
Plants, especially the plants of a particular place and time.