Dim sum various mixtures of flowers with green tea, black tea or oolong tea. Flowers used include jasmine, gardenia, magnolia, grapefruit flower, sweet-scented osmanthus and rose. There are strict rules about the proportion of flowers to tea. Jasmine tea is the most popular type of scented tea, and is often the most popular type of tea served at yum cha establishments. The above teas are produced in most of China. Chinese tea bushes ("Camellia sinensis") are cultivated in the mountain areas of tropical and subtropical regions or wherever there is a proper climate, sufficient humidity, adequate sunshine and fertile soil. Chinese tea
Camellia sasanqua or nuts are used to make tea seed oil, which is used for lighting, lubrication, cooking and cosmetic purposes. Tea oil has a higher calorific content than any other edible oil available naturally in Japan. "Camellia sasanqua" is valued in gardens for its handsome glossy green foliage, and fragrant single flowers that can range in color from white to deep pink and are produced extremely early in the season. Various cultivars have been selected, of which 'Crimson King', 'Hugh Evans' and 'Jean May' have gained the Royal Horticultural Society's Award of Garden Merit. Camellia sasanqua Camellia sasanqua, with common name