苞鳞

苞鳞-种鳞复合体理论和种子植物生殖器官演化模型

Bract - scale and seed - scale complex theory and a new evolutionary model of reproductive organs of seed plants

在苞鳞中只形成一组倒转的维管束，如侧柏属和翠柏属；

In Calocedrus and Platycladus , only a single series of inverted vascular bundles were generated in the adaxial side of the bract scale ;

苞鳞：在裸子植物的雌球果中大量存在的结构，每个苞鳞都包含一个珠鳞。

Bract scale The structure found in large numbers in the female cone of gymnosperms , each bearing an ovuliferous scale in its axil .