Trichomanes reniforme

The Kidney Fern.

One of my favourite ferns. There is no mistaking this one when you see it, with its kidney-shaped leaves.

They shrivel up quite quickly when they get dry, but soon bounce back with moisture.
This image shows "sporangia" - the liitle black things in clusters called "sori" - emerging from their cup-shaped "indusia" - a flap of tissue which protects the sporangia.

And one more piece of information that you will probably never need to know: most ferns produce 64 spores in each sporangium.

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