involucral

enUK

in·vo·lu·cre

I0218800 (ĭn′və-lo͞o′kər)n. A group of one or more whorls of bracts beneath a flower or flower cluster.
[French, from Latin involūcrum, wrapper, envelope; see involucrum.]
in′vo·lu′cral (-krəl), in′vo·lu′crate (-krĭt, -krāt′) adj.