MIN Lichen Herbarium Home Welcome to the home page of the Univ. of Minnesota Lichen Herbarium. From here you can visit any of the following pages that give lists of the lichens in the various databases. The lichen herbarium has over 135, 000 lichens from all over the world. This includes over 20, 000 in the exsiccat database. From the list below select the database for further choices Lichens of ...