Definition of involucre in English:

involucre

Line breaks: in¦vo|lucre
Pronunciation: /ˈɪnvəl(j)uːkə
 
/

noun

1 Anatomy A membranous envelope.
2 Botany A whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel.
More example sentences
  • The cupules are simple involucres of bracts which are spirally arranged (according to a Fibonacci pattern) on the floral axis preceding the flower.
  • Basal leaves and flowers initiate from a tuberous rhizome and three green cauline leaves arranged in a whorl form an involucre around the developing flower.
  • The Hermaphrodite cyathium shows the characteristics measured (length and width of the cyathium involucre and the nectary).

Origin

late 16th century: from French, or from Latin involucrum, from involvere 'roll in, envelop' (see involve).

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