Developing endosperm is of the nucellar type. In late July, mature seeds contain very less endosperm and a big embryo with 2 massive cotyledons,the hypocotyl and the radicle.

• 胚乳之发育为核型。约在7月下旬，成熟种子只具有非常微量之胚乳，以及两枚子叶、胚轴及胚根。