Each dot is called a sorus and consists of many sporangia mounted on stalks . 每个圆点称为一个囊群，由许多长在柄上的孢子囊组成。
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The spores are liberated by rupture of the sporangium wall 当孢子囊壁破裂时可以将其内的孢子释放出来。
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Zoosporangium ( pl . zoosporangia ) a sporangium that produces zoospores 游动孢子囊：产生游动孢子的孢子囊。
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Stomium ( pl . stomia ) the site at which a sporangium or pollen sac ruptures to release the spores or pollen 裂口：孢子囊或花粉囊的开裂位置，小孢子或花粉粒从中散出。
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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。
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Leaves tufted ; stipes 15 - 30 cm long , densely scaly at base , glabrous above ; sterile lamina about 60 cm long and 20 cm wide , simply pinnate ; pinnae numerous , alternate or subopposite , linear - lanceolate , the largest about 12 cm long and 1 cm wide , base cordate , apex acuminate , margin finely toothed ; veins close , forking once or twice and forming areoles near the midrib ; fertile lamina similar to sterile ones , but somewhat reduced , about 8 cm long and 0 . 4 cm wide , lower surface almost entirely covered with sporangia 叶簇生；叶柄长15 - 30厘米，基部密被鳞片，向上近光滑；不育叶片长约60厘米，宽20厘米，一回羽状；羽片多数，互生或近对生，线状披针形，最长者长达12厘米，宽约1厘米，顶端长渐尖，基部心形，边缘有细密锯齿；叶脉1 - 2次分叉，近中脉形成网眼；能育叶与不育叶相似，但较小，长约8厘米，宽约0 . 4厘米，下部满布孢子囊。
