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

Heads radiate or discoid, the involucre little or not at all imbricated, not scarious.

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

Stem-leaves auriculate-clasping or with winged-petiole-like base; involucre lax 42–45 Stem-leaves sessile, but rarely cordate or auriculate at base 36–41 § 1.

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

Scales of the involucre equal and all in one row.

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

Scales of the hemispherical involucre imbricated in several series, with slender more or less spreading green tips.

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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