Ferns grow in shady and moist places.

羊物生长在阴暗潮湿的地方。

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

心皮能产生孢子的维管物（羊）有胚珠的裸子物的大孢子叶是同源的。