The ovule is bitegminous and tenuinucellate.The archesporial cell locates under the nucellus epidermis, which develops into fuctional megasporocyte.

胞位于珠心表皮之下，直接起大母胞功能。

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

摘要樟大母胞经一系列变化，发育成雌配体。

The carpel is homologous with the megasporophylls of certain spore-bearing vascular plants (pteridophytes) and the ovuliferous scales of gymnosperms.

心皮和能产生维管植物（羊齿类）还有具胚珠裸植物大叶是同源。