n. (pl. -sia ) 1.【解剖学；动物学】胚被；幼虫膜。 2.【植物；植物学】柱头下毛圈；囊群盖。 adj. -sial
a membrane enclosing and protecting the developing spores especially that covering the sori of a fern
例句与用法
1.
Sori borne near the costule , indusium spherical , membranous 孢子囊群靠近中脉著生；囊群盖球形，膜质。
2.
Sori hemispheroid , in 2 - 3 series on each side along the costules , without indusium 孢子囊群圆形，沿中脉两侧各排成2 - 3行，无囊群盖。
3.
Sori 1 - 5 pairs borne on the lower surface of ultimate lobes at the end of basal veins ; indusium dehiscent in two equal halves when mature 孢子囊群1 - 5对，生于末回裂片下面近基部小脉顶端；囊群盖成熟时对开2裂。
4.
Indusium the flap of tissue , derived from the placenta , that encloses the developing sporangia in the sorus of a fern 囊群盖：是一种起源于胎座（应为叶表皮译者注）的瓣片状组织，覆盖在蕨类植物孢子囊群中正在发育的孢子囊上。
5.
Our company mainly sells fpc base materials ( indusium , rubber latex and pi doily ) , whose quality and technologyis competitive . professional after - sale service staff is organized as well , which provides the clients with complete technique support as a strong backup force for the quality of the products . the products sold by our company has , in a short term , been accepted and appreciated by its famous counterparts 公司主要销售fpc基材（覆盖膜、纯胶膜、 pi补强片） ，公司产品品质优异，技术力量雄厚，并配有专业的售后服务团队；将为您提供完善的技术支持，是您品质保证的强有力后盾，公司所销售的产品在短时间内得到了业界知名企业的认可与赞同。
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