Which of the following plants are considered the oldest of the vascular plants?

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The treelike lycopsids or scale trees are considered the oldest of the vascular plants, dating back to the Devonian period over 380 million years ago. While liverworts and mosses are also ancient plant groups, they are non-vascular and lack true roots, stems, and leaves. While tree ferns are vascular, they first appeared during the late Carboniferous period, which is much later than the treelike lycopsids.

Which of the Following Plants Are Considered the Oldest of the Vascular