Lichen samplers

Lichens on bark, found underneath cottonwoods at Oyster Bay:

Leaf lichen, and crust lichens, maybe bark barnacle.

Another piece of bark. Black, brown, green, yellowish dots and circles.

I look at the photos in my guide, read through the descriptions, and decide that I know what species a lichen is. Then I read it all again and change my mind.

It doesn't matter: they're beautiful, no matter what species they are.