Photo by Luciearl

Common Powderhorn (Cladonia coniocraea) is a widespread and very common lichen in Europe, Asia, and North America. In the United States it is found from the east coast to the Midwest, including Minnesota, on the west coast, and in the Rocky Mountains. It grows in the shade on decaying stumps and logs and often at the bases of trees. It is resistant to pollution and can be found in urban areas.

Common Powderhorn produces two types of green to grayish-green vegetative growth: a flat, overlapping, leaf-like scale that adheres closely to the substrate; and a slender, hollow, vertical stalk with a pointed tip. The undersides of the basal scales are white because they lack a protective outer coating. The surface of the stalk is mealy due to a covering of tiny reproductive granules.

http://www.minnesotaseasons.com/Fungi/Common_Powderhorn.html