bract scale
常见例句
- There was no inverted vascular bundle developed in the bract scale of Thuja occidentals.
崖柏屬雌球果的苞鱗中沒有倒轉的維琯束形成。 - In Calocedrus and Platycladus, only a single series of inverted vascular bundles were generated in the adaxial side of the bract scale;
在苞鱗中衹形成一組倒轉的維琯束，如側柏屬和翠柏屬； 返回 bract scale