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2.plants distinguished by tubular petaloid perianth and inferior ovary: Aristolochiaceae; Rafflesiaceae; Hydnoraceae.
以管形花瓣状花被和下位子房著称的植物；马兜铃科；大花草科；一个产于非洲和阿根廷的有花植物科。收藏指正
3.an order of dicotyledonous plants of the subclass Asteridae; have opposite leaves and an inferior compound ovary.
菊亚纲双子叶植物的一目；有成对的叶子和低位复合子房。收藏指正
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