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.
Language in Cambodia. Khmer is the official language of Cambodia and is used in most social contexts including government administration, education at all levels, and in the mass media. It is spoken by some 7 million people living there, roughly 90% of the population. Regional differences are slight and normally mutually intelligible.