花被片：tepal
当萼片(sepal)和花瓣(petal)长的很像而无法分辨的时候，我们将萼片和花瓣合称花被片(tepals)。“when ,as in this lily flower ,the sepals and petals look the same ,they are known as perianth segments,or tapals."(《Eyewitness Plant》by DK )