Tree ferns are older than dinosaurs. And that’s not even the most interesting thing about them – Phys.org

With massive fronds creating a luxuriously green canopy in the understory of Australian forests, tree ferns are a familiar sight on many long drives or bushwalks. But how much do you really know about them?
First of all, tree ferns are ferns, but they are not really trees. To be a tree, a plant must be woody (undergo secondary plant growth, which thickens stems and roots) and grow to a height of at least three meters when mature. While tree ferns can have single, thick trunk-like stems and can …

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