What structural characteristic makes Proteas and Leucadendrons inherently durable outside of water compared to delicate flowers?

Answer

Architectural, woody structure

Proteas and Leucadendrons are known for their architectural and woody structure, featuring thick, often leathery petals and sturdy stems that inherently resist wilting.

What structural characteristic makes Proteas and Leucadendrons inherently durable outside of water compared to delicate flowers?
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