Leucobryaceae

Leucobryaceae is a family of mosses in the order Dicranales. The name Leucobryaceae is derived from the Greek words "leukos" meaning white and "bryon" meaning moss, referring to the pale or whitish appearance of many species due to the presence of large, empty hyaline cells in their leaves. These leaves are often thick and somewhat succulent. The family is widespread, found in tropical and temperate regions across the globe.

Species within Leucobryaceae are typically found in moist environments, often growing on soil, rocks, or tree bark. They can form dense mats or cushions. A characteristic feature of the family is the presence of a costa (a central rib) in the leaves, which is often broad and composed of multiple layers of cells. The sporophytes, which consist of a seta and a capsule, are usually erect.

The family includes several genera, such as Leucobryum, Octoblepharum, and Arthrocormus. Leucobryum species are particularly well-known, with some species like Leucobryum glaucum being common in North American and European forests. These mosses play a role in their ecosystems by helping to retain moisture, stabilize soil, and provide habitat for small invertebrates. Their distinctive white coloration can also make them noticeable features in their habitats.