involucre

[in-vuh-loo-ker]

in·vo·lu·cre

[in-vuh-loo-ker]
noun
1.
Botany. a collection or rosette of bracts subtending a flower cluster, umbel, or the like.
2.
a covering, especially a membranous one.

Origin:
1570–80; < Middle French < Latin involūcrum involucrum

in·vo·lu·cral, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Involucre is always a great word to know.
So is seedless vascular plant. Does it mean:
female reproductive organ which produces eggs in bryophytes, ferns and most gymnosperms
plants with true roots, stems and leaves dispersed by spores because they don't produce seeds
Collins
World English Dictionary
involucre or involucrum (ˈɪnvəˌluːkə, ˌɪnvəˈluːkrəm)
 
n , pl -cres, -cra
a ring of bracts at the base of an inflorescence in such plants as the composites
 
[C16 (in the sense: envelope): from New Latin involucrum, from Latin: wrapper, from involvere to wrap; see involve]
 
involucrum or involucrum (ˈɪnvəˌluːkə, ˌɪnvəˈluːkrəm, -krə)
 
n
 
[C16 (in the sense: envelope): from New Latin involucrum, from Latin: wrapper, from involvere to wrap; see involve]
 
invo'lucral or involucrum
 
adj
 
invo'lucrate or involucrum
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
involucre   (ĭn'-və-l'kər)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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