Two cultivars of the filbert tree or shrub, the purple-leaved filbert (Corylus maxima Purpurea) and the purple-leaf European filbert (Corylus avellana Fusco-Rubra), produce purple leaves and work well in landscapes as screens or hedges.
Cambodia (7.5 million). The national language is Khmer, spoken by about 85 percent of the population. It is co-official with French, which has perhaps 500,000 speakers. Chinese and Vietnamese are each spoken by about 400,000 people. Among tribal languages, Cham is the most important, with about 100,000 speakers.
French language in Cambodia. Cambodia is the smallest of the three Francophone communities in Southeast Asia, the others being found in Vietnam and Laos. Out of all Asian Francophone nations, Cambodia is where French has declined the most. In 2014, French is spoken by 423,000 people as a foreign language, which is 3% of the country's population and by only 873 people as a mother tongue according to the country's 2008 census.