羊齿类

Ferns grow in shady and moist places.

羊植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.

心皮和能产生的维管植物（羊）有具胚珠的植物的大是同源的。