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, ˌɪnvəˈluːkrəm /

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

Etymology

Origin of involucre

1570–80; < Middle French < Latin involūcrum involucrum

Example Sentences

Scales of the bell-shaped involucre lanceolate, equal, somewhat in 2 rows.

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 Gray, Asa

Scales of the involucre more or less imbricated, usually with herbaceous or leaf-like 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 Gray, Asa

Heads many-flowered; rays pistillate, or none; involucre cylindrical to bell-shaped, simple or with a few bractlets at the base, the scales erect-connivent.

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 Gray, Asa

Scape 1° high, from a thickened caudex, leaves lanceolate, elongated, tapering to a sharp point, entire, woolly on the margins; scales of the involucre lanceolate, sharp-pointed, achene beakless.—Prairies,

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 Gray, Asa

Smooth, or at first pubescent; outer involucre reflexed.

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 Gray, Asa