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Sciadophyton is a morphotaxon of lower Devonian plants known only from compression fossils. It is interpreted as the monoicous gametophyte of a vascular land plant, because its vascularised branches end in a cup-shaped structure bearing gametangia, both antheridia and archegonia, but little structural information is preserved at the cellular level. It formed rosettes of stems, which may have radiated from a basal gametophytic corm-like thallus or from a central 'stem' or even from a root system, although there is not enough evidence to discriminate between these possibilities.
Text excerpted from the Wikipedia article Sciadophyton by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
