Together they house thousands of specimens and are continuing to grow. These collections document vascular plants and fungi from the Southern Rocky Mountain Region. The herbaria hold historic collections, uncommon species, and recent collections. Sam Mitchel Herbarium of Fungi is one of the most diverse, well-collected and actively curated fungal collection in the region. 2017 marks the 50th Anniversary of the Sam Mitchel Herbarium of Fungi. The Gardens natural history collections also include a small ethnobotany collection and an insect collection.