Clavascidium umbrinum explained

Clavascidium umbrinum, also known as Catapyrenium umbrinum,^[1] is a lichen.^[2] It is characteristically 2 to 4 millimeters wide and medium to dark brown found on soil.

Found in Europe and North America; rather rare in Arizona, California, Chihuahua and Baja California.

Notes and References

1. Web site: Clavascidium umbrinum. Global Biodiversity Information Facility. 28 November 2016.
2. Web site: United States National Herbarium - Smithsonian. Lichen Portal. 28 November 2016.