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n.1.(Paleon.) A genus of fossil trees of the Devonian and Carboniferous ages, having the exterior marked with scars, mostly in quincunx order, produced by the separation of the leafstalks.
References in periodicals archive ?
These tropical wetlands were instead mainly dominated by plants such as ferns and horsetails, and most significantly giant club mosses.
Their fast, determinate growth meant the giant club mosses generated enormous quantities of peat.
An artist's impression of the wettest part of the coal swamps, showing giant club mosses in various stages of their life cycle.