Caps of mature purple toothed polypore mushrooms ...

The provided image showcases three mature purple toothed polypore mushrooms (Trichaptum biforme) with green algae on a fallen elm tree trunk. The mushrooms are situated near the top of the image, featuring large brown caps and light-green algae growing on their surface.

In the background, a dark gray to black bark texture is visible on the fallen tree's trunk. A few scattered twigs can be seen in the lower left portion of the image, mostly hidden behind one of the mushroom caps.

The overall image presents a close-up view of the mushrooms and their surroundings, highlighting their unique characteristics and the natural environment in which they grow. – AI vision