Anthemis is a genus of aromatic flowering plants in the family Asteraceae, closely related to Chamaemelum, and like that genus, known by the common name chamomile; some species are also called dog-fennel or mayweed. Anthemis are native to the Mediterranean region and southwest Asia east to Iran. A number of species have also become naturalized in the United Kingdom and other parts of the world.

Orthonama obstipata, the gem, is a moth of the family Geometridae. The species was first described by Johan Christian Fabricius in 1794. It is a cosmopolitan species. In continental Europe though in the northeast, its range does not significantly extend beyond the Baltic region and it is absent from northern Russia. This well-flying species is prone to vagrancy and able to cross considerable distances of open sea; it can thus be regularly found on the British Isles and even on Iceland.