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involucre

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in·vo·lu·crum

, pl.

in·vo·lu·cra

(in'vō-lū'krŭm, -loo'kră),
1. An enveloping membrane, for example, a sheath or sac.
2. The sheath of new bone that forms around a sequestrum.
Synonym(s): involucre
[L. a wrapper, fr. in-volvo, to roll up]
Farlex Partner Medical Dictionary © Farlex 2012

involucre

  1. a calyx-like structure formed by bracts below the base of a condensed INFLORESCENCE.
  2. a growth of the tissue of the thallus in liverworts (see HEPATICA that covers and protects the ARCHEGONIUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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References in periodicals archive
Capitulescences cymose, two- to nine-headed, subterminal to lateral, rarely monocephalous; capitula pedunculate, homogamous, bilabiate, two- to five-flowered; receptacle epaleate; involucre multiseriate, cylindrical, phyllaries glabrous.
The subfamily Mutisioideae (Asteraceae)
Capitulescences monocephalous or in loose to dense apical cymes; capitula short-pedunculate, homogamous, discoid or disciform; receptacle epaleate; involucre multiseriate.
The subfamily Mutisioideae (Asteraceae)
This group of species constitute the genus Cloiselia (Ortiz, 2006a), characterized by corollas much longer than the involucre, disc floret epidermal cell cuticle ornamentation "intestine-like," long simple (not twin) hairs on disc florets corolla, stamen insertion near the corolla base, and pollen echinate, among other characters.
The subfamily Mutisioideae (Asteraceae)
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