Runcaria

Runcaria heinzelinii is an extinct species of plant from the Middle Devonian of Belgium.It is the only species classified under the genus Runcaria,[1] named after Jean de Heinzelin de Braucourt.It was a precursor to seed plants, predating the earliest of the latter by about 20 million years.The fossil pieces of Runcaria heinzelinii that have been found are short branched stems that at their tips have a radially symmetrical megasporangium surrounded by a cupule.Thus, this fossil plant has all of the qualities of seed plants except for a solid seed coat and a system to guide the pollen to the ovulum.
PreꞒtransitional fossilScientific classificationPlantaeTracheophytesProgymnospermopsidaBinomial nameextinctspeciesMiddle DevonianBelgiumJean de Heinzelin de Braucourtmegasporangiumintegumentwind pollinationseed coatBibcodeWikidata