involucre

American  

[in-vuh-loo-ker] / ˈɪn vəˌlu kər /

noun

1. Botany. a collection or rosette of bracts subtending a flower cluster, umbel, or the like.

2. a covering, especially a membranous one.

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involucre British  

/ ˈɪnvəˌluːkə /

noun

1. a ring of bracts at the base of an inflorescence in such plants as the composites

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involucre Scientific  

/ ĭn′-və-lo̅o̅′kər /

1. A series of bracts beneath or around a flower or flower cluster. The cupule, the cuplike structure holding an oak acorn, is a modified, woody involucre.

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Other Word Forms

• involucral
  adjective
• involucrate
  adjective

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Etymology

Origin of involucre

1570–80; < Middle French < Latin involūcrum involucrum

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Example Sentences

See Examples For:

involucre

Distinguished from the last two tribes by the more or less dry and scarious imbricated scales of the involucre.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Cinereous-puberulent, 2° high; leaves oval and oblong, mostly obtuse at both ends; thyrse rather loose; involucre broad.—S. Kan. and southward.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Flowers in little axillary clusters or heads, usually surrounded by a scale-like 3-leaved involucre.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Characters of Dipsacus, but the green leaves of the involucre and involucels not rigid nor spinescent.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

Carpels few, stipitate, several-seeded.—Perennial herbs, with palmately multifid radical leaves, the scape bearing a single large yellow flower surrounded by an involucre of a single leaf.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray

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