indusium
n. [解剖] 苞膜；[昆] 胚被；囊群盖
复数 indusia
例句
The indusium is absent.
不存在胚被。
The indusium is absent. The annulus is transverse and complete, and consists of about 18 thickened cells.
环带横列于孢子囊的上部，完全，单排细胞，细胞数目约为18个。
