macrospore

The character of macrospore in development were as followed: anatropal ovule, basal placenta, thick nucellar, two integument, megaspore mother cell coming directly from archesporial cell, early degenerating antipodal cell, thedevelopment of the embryo sac being conformed as the polygonum type.

雌配子体发育的特点是：倒生胚珠、基底胎座、厚珠心、双珠被、孢原细胞直接长大成大孢子母细胞、反足细胞退化早，胚珠发育为蓼型。

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macrospore metrocyte of pinus sylvestris var. mongolica developed to female gametophyte containing female gamete-egg by a series of changes.

樟子松大孢子母细胞经一系列变化，发育成雌配子体。

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Megasporogenesis and Female Gametogenesis: Archesporium is of one cell, it directly functions as macrospore mother cell.

大孢子和雌配子体发生：孢原为一个细胞，它直接起大孢子母细胞功能。

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