sour orange plant summer orange plant Amanatsu or natsumikan is a yellowish orange citrus hybrid fruit, a group of cultivars of *Citrus natsudaidai*, which were discovered in 1740 in the Yamaguchi prefecture of Japan. Natsumikan is about the size of grapefruit and oblate in shape. The fruit contains 12 segments and about 30 seeds. The rough textured fruit is easy to peel and is commonly eaten fresh. It is also used for wide variety of products ranging from marmalades to alcoholic beverages. [https://en.wikipedia.org/wiki/Amanatsu] Citrus natsudaidai Hayata citrus aurantium subsp. nastridaidai citrus natsudaidai golden oriental grapefruit summer orange summer tangerine requires discussion