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Hedeia is a genus of early land plants of uncertain affinity. It comprises erect axes terminating in corymbose clusters of erect sporangia.
The type species, H. corymbosa, was first described by Isabel Cookson from a few specimens in fine sandstone from near Alexandra, Victoria, Australia. She gave no derivation of the generic name. At the time, the locality was regarded as being of Silurian age, but it is now known to be Early Devonian. It is claimed that an undescribed species, also from Victoria, extends from the Early Devonian back to the Late Silurian.
Text excerpted from the Wikipedia article Hedeia by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
