详细介绍杜鹃叶山茶 Camellia azalea 与传统茶花品种的 6个杂交组合获得的其中 10 个四季茶花新品种的观赏属性。这些品种不仅花色艳丽、花型各异、开花稠密，而且叶片浓绿、生长旺盛、开花期长，夏季始花，秋、冬盛花，翌年春季仍能零星开花。对2 个四季茶花杂交新品种及其传统茶花亲本材料在炎夏和严冬极端气温下的表现进行观测，结果表明四季茶花新品种在耐晒、抗热方面优于传统茶花品种，而在抗寒方面与传统茶花品种相差不大；冬季极端低温不低于 -5℃地区，仍然是四季茶花适宜栽培区。

The ornamental attributes of 10 new Camellia cultivars that bloom year-round which were obtained from 6 crosscombinations between Camellia azalea and traditional Camellia cultivars were described in details. These cultivars not only are very beautiful in their flowers color, different forms in their flowers shapes and blooming densely, but also have dark green leaves, growing vigorously, long blooming period which starts to bloom in summer, peak blooming from autumn to winter and sparsely blooming in the spring of following year. Based on the survey results of two new Camellia cultivars and their cross-parents which are traditional Camellia materials under the extreme airtemperature in hot summer and cold winter, it has been shown that the new Camellia cultivars are better than the traditional Camellia cultivars in sun-resistance and heat-resistance, and there is no difference between them in cold resistance. The areas where the extreme low-temperature in winter is not lower than -5℃ are suitable for cultivation of the new Camellia cultivars.

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国家重点研发计划“花卉高效育种技术与品种创制”（编号：2019YFD1001000）；广东省重点领域研发计划“多瓣型四季开花茶花新品种培育及产业化”（编号：2018B020202002）