Another common place to find lichens is on headstones in old cemeteries. I found this one in Cades Cove in the Smokies. These lichens are growing on the sheep, which is made of marble. Some of the very old headstones were nearly illegible due to a heavy growth of lichens.
Leakey, TX (Lost Maples SP) March 29, 2009 I found this odd lichen growing on a limestone boulder in Lost Maples State Park during our trip to Texas.
Taft, CA March 22, 2007 I found this odd lime-green lichen growing on the north side of a fence post in the mountains above Taft, CA (on the day that I was yearning to see some green grass after spending a week in the desert!). Note the huge, brown apothecia. This lichen gets its name from the fact that it was once used to kill wolves.