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

Flowers small, in open naked cymes, or in close heads surrounded by a corolla-like 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

Leaves alternate 75 Scales of the involucre in two 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 Asa Gray

Tall, rather glabrous; leaves linear-lanceolate, retrorsely denticulate; involucre very squarrose, the scales with long filiform tips.—Mo.,

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

Fruit oblong to ovate, glabrous, with slender equal ribs, numerous oil-tubes, and depressed or cushion-like stylopodium.—Glabrous perennials, with ternately or pinnately compound leaves, involucre and involucels scanty or none, and white or yellow flowers.

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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