involucre
n.
5Fr < L involucrum, wrapper, case, envelope < involvere: see INVOLVE6
1 Anat. a membranous covering or envelope
2 Bot. a ring of small leaves, or bracts, at the base of a flower, flower cluster, or fruit: involucres are found in all plants of the composite family Also in#vo[lu4crum 73kr!m8, pl. 3cra 73kr!8
in#vo[lu4cral 73kr!l8
adj.

Nothing to do with "filthy lucre", of which I wish I had more. Such as portraits of dead Presidents.