The natural film of a fine, silvery-whitish or bluish-grey, somewhat powder-like or waxy substance on the surface of some plants, fruits and vegetables (fig.), is called nuan in Thai. It is equivalent to the English botanical term glaucous, which derives from Greek and means ‘bluish-grey’. It is a feature of this small epiphyte, known as Silver Star (fig.), which has here been mounted on a dried pong pong seed (fig.).