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。

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Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.

大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。

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