A portion of plant substance (PO:0025161) comprised predominantly of very long chain aliphatic lipids and is part of a plant cuticle (PO:0000022). [source: PMID:12467640, PO_Ref:00010]
Comment
Also includes triterpenoids and minor secondary metabolites, such as sterols and flavonoids. May be embedded within or external to the layer of cutin of the cuticle proper. Phenotypically, wax is distinguished as the glaucous or whitish bloom on a part of a plant shoot system that corresponds to crystalloid epicuticular wax with light scattering capacity.