spathe
nounA leaflike bract that encloses or subtends a flower cluster or spadix, as in the jack-in-the-pulpit.
nounIn botany, a peculiar often large and colored bract, or pair of bracts, which subtend or envelop a spadix, as in palms and arums.
nounIn zoology, some spatulate or spoon-shaped part.
nounA special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms. See the Note under
A large
a conspicuous bract surrounding or subtending a spadix or other inflorescence