I am always on the lookout for plants called mosses that are actually not. I visited the Missouri Botanical Garden with some friends while in St. Louis a few weeks back for the Botany 2011 conference. There I spotted this plant labeled Moss Fern. It is Selaginella pallescens, which is a lycopod or more traditionally called a fern ally. It is distantly related to moss as they are both green plants, but is definitely not a true moss. It has both vasculature (internal plumbing of xylem and phloem) as well as true roots to anchor it into the soil and function in water uptake.
There is a lot of plant life going on in this photo. The Selaginella is located behind the sign-post and also directly to the left. A few other species made it into the shot including a palm in the upper left and some mosses in the lower left.
There were quite a few other spots around the garden where mosses were growing, however, none of them were labeled. It is a bit of a bummer that the mosses are so blatantly ignored at a botanical garden. Here are a few shots from mosses inside the Climatron.
In general the garden didn't seem to add any fake animals to add to the tropical ambiance, thus this frog below looked a little out of place.
Some additional photos of the garden plants and me constantly looking for mosses can be seen over at my friend Em's blog.