A special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms. See the Note under Bract, and Illust. of Spadix.
n. (Gr. spathe, flat blade) a large leaflike part or pair of such enclosing a flower cluster (especially a spadix).
A modified leaf sheath that subtends and often encloses some of the inflorescence.