leucodon

Leucodon is a genus of mosses belonging to the family Leucodontaceae. These mosses are typically found in temperate regions and are often characterized by their pendulous or hanging growth habit. They are epiphytic, meaning they grow on other plants, usually trees, but they can also be found on rocks.

The gametophyte of Leucodon is dioicous, with male and female reproductive structures on separate plants. The leaves are often ovate or lanceolate and can be shiny or dull. The sporophytes, when present, are erect capsules borne on a short seta. Leucodon species are generally slow-growing and can be sensitive to air pollution.

Several species are recognized within the genus Leucodon, though their taxonomic status can be subject to revision. Common species include Leucodon sciuroides, which is widespread in Europe and North America. This species is often found on tree bark and has a distinctive "squirrel tail" appearance due to its densely arranged leaves.

Leucodon mosses play a role in their ecosystems by providing habitat and contributing to moisture retention. Their presence can also be an indicator of air quality, as they tend to decline in areas with high pollution levels. While not of significant economic importance, they are of interest to bryologists and ecologists studying plant communities and environmental conditions.