以下为句子列表：
英文: Columella 1. The structure present in sporangia of many zygomycete fungi (e.g. Mucor) produced by formation of a domeshaped septum cutting off the sporangium from the sporangiohore.
中文: 1囊轴：许多接合菌的孢子囊中的结构（毛霉属）。在孢子囊的中央形成一个中空的腔，其外一层薄壁就叫做囊轴。
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英文: Indusium The flap of tissue, derived from the placenta, that encloses the developing sporangia in the sorus of a fern.
中文: 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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英文: The plant body resembled a fern and did not produce flowers, the seeds developing from megasporangia borne on the margins of the fronds.
中文: 在石炭纪该种植物生长繁茂，到白垩纪基本灭绝，目前仅保留有化石植物。
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