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Pseudobornia ursina is an extinct tree-like plant known only from Upper Devonian fossils, not a plant you can grow. It is the earliest fossil assigned with certainty to the horsetail class Equisetopsida.
Pseudobornia is a genus of plants identified only from the Upper Devonian. It contains a single species Pseudobornia ursina, and is the earliest fossil assigned with certainty to the Equisetopsida.
The first fossils of Pseudobornia were collected by Johan Gunnar Andersson on Bear Island in the 1890s. Hans-Joachim Schweitzer, a paleobotanist, was the first to interpret the fossils as belonging to a large tree, based on additional fossils identified in Alaska in the 1960s.
Text excerpted from the Wikipedia article Pseudobornia by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
