Ferns grow in shady and moist places.

羊齿类物生长在湿的地方。

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

心皮能产生孢子的物（羊齿类）还有具胚珠的裸子物的大孢子叶是同源的。