Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分体为线形，合点端功能大孢子发育成为蓼型胚囊。
The development of the embryo sac conformed to the Polygonum type.
胚的发育类型为柳叶菜型，核型胚乳。
The development of embryo sacs of 'Ziyingui' belonged to polygonum type.
籽银桂的胚囊发育类型为蓼型。
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