This work is made by the process of electroforming. The wax and plant material are then melted out, and the piece cleaned and blackened with a chemical patina.
Residual silver remains in the interior of each piece, and is burnished.
The products of decay are absorbed as nutriment by the epidermal cells in this region. The number of animals meeting with this fate is often so great that an offensive odour, arising from the decaying bodies, is emitted by the utricles and is noticeable at a considerable distance. The hollow petiole is utricular or tubular and only slightly enlarged towards the top. The dorsal side of each leaf is, however at its upper end hollowed out like a cowl or a helmet, and forms a cupola. Insects are attracted to exudations of honey which they suck or lick up with avidity.