Some shoots are sterile while others are fertile, bearing at the apex the so-called fructification - a dense oval, oblong conical or cylindrical spike, consisting of a number of shortly-stalked peltate scales, each of which has attached to its under surface a circle of spore-cases (sporangia) which open by a longitudinal slit on their inner side. [Please select]
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The leaves are peltate, and in the bud are folded about the end of the petiole after the manner of an umbrella. [Please select]
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