Abstract: ‘Yunning 1’selected from the‘Eureka’lemon，is a good lemon cultivar. It shows some characters，such as moderate growth，bisexual flowers，petals purple，plenty flowers and blossom some times amount of a year. The average fruit weight is 145 g，elliptic，papillate，not fruit top seal ring，fruit surface smooth，the oil cell sag，pulp yellow-white，single fruit contains 10 capsules and 10–45 seeds，the juice flesh crisp. The soluble solids of 8.46%，total acid of 7.06%，vitamin C of 0.49 mg · g ^-1. Fruits can be listed in the middle of August by bagging technology，the skin turn to be yellow in November under the condition of natural. It can be fruit in the first year，high yield after 3 years，its yield is 60.0 t · hm^-2 and high quality fruit rate reached 70%. It plant in Dali，Dehong，Baoshan and other regions in Yunnan Province.

Key words: lemon, cultivar