孢子叶

Quillworts are heterosporous, mainly aquatic perennials, with a dense rosette of tubular quill-like leaves arising from a short, stout rootstock.

水韭目植物具有异型孢子，是多年水生植物。条形密集簇生于粗短根茎之上。

Indusium The flap of tissue, derived from the placenta, that encloses the developing sporangia in the sorus of a fern.

是一种起源于胎座（应为表皮译者注）瓣片组织，覆盖在蕨类植物孢子囊群中正在孢子囊上。