tepal

tepal

noun

an undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips)

数据来源：WordNet

1

The tepal of Phytolacca initiates in 2 / 5 spirals , the starting direction is either clockwise or counterclockwise .

商陆属植物的花被发生为2／5螺旋，具有顺时针发生和逆时针发生两种方向。
2

The number of tepal trace is various on four kinds of fagopyrum .

四种荞麦的花被片脉迹数目是不同的。
3

In the species with monocyclic stamens 8-10 stamen primordia arise nearly simultaneously after the initiation of tepal primordia .

在单轮雄蕊的种中8-10枚雄蕊为近同时发生；