1, Daye tea is a kind of Pu 'er tea. It is a unique tea species in Yunnan, originating in Xishuangbanna, Pu 'er and other places in Yunnan, and is the raw material for making Pu 'er tea. Yunnan is a big tea planting province, and most of the tea varieties planted are big leaf tea. As one of the main producing areas of big leaf tea, Pu 'er City has a large area of big leaf tea cultivation in all districts and counties of the city.

2. Pu 'er tea (scientific name: Camelliasinensisvar.assamica) is a big tree with a height of16m, slightly hairy branches and white terminal buds. The leaves are thin leathery, oval, brownish green at the top after drying, slightly shiny, light green at the bottom, hairy at the ribs, the rest are pubescent, and the old leaves become bald; Lateral veins 8-9 pairs, obviously above. Flowers axillary and pilose. Bracts 2, caducous. Sepals 5, suborbicular, glabrous outside. Petals 6-7, obovate, glabrous. Stamens 8- 10 mm long, free and glabrous. Ovary 3-loculed, velvety; Style 8 mm long, 3-lobed at the top. Capsule oblate and triangular. Each chamber has 1 seed, nearly round, with a diameter of 1 cm.

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