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.
Khmer is the official language of Cambodia. The Cambodian language is derived from the Mon-Khmer (Austro-Asiatic) language family. Khmer is renowned for possessing one of the largest sets of alphabets; it consists of 33 consonants, 23 vowels and 12 independent vowels. While tourists may wish to learn a few spoken phrases before or when visiting Cambodia, English is widely spoken and understood.