Many theories of photography, as there is still no unified and comprehensive 'theory of photography' is still lacking. In photographic practice, the desired pictorial message is increasingly determined by the by the appropriate photographic techniques.
Clivia, also known as strapleaf, has a long history in Europe. Originally from South Africa, it was named Clivia after a botanical revision by Lady Charlotte Florentine Clive, the Duchess of Northumberland.