![Atrichum undulatum [CC-BY-SA-4.0 Steve Cook]](https://www.polypompholyx.com/wp-content/uploads/2018/01/Atrichum_undulatum-300x297.jpg)
When we went to the Berlin Botanischer Garten in 2005, we saw some pretty cool stuff, including a flowering Welwitschia and some fantastic tree ferns. However, like every other botanical garden I’ve ever visited, mosses , hornworts and liverworts were effectively ignored, or – worse – treated as dreary also-rans at the start of one …