Extract from Wikipedia article: Clavascidium lacinulatum is a dark brown squamulous terricolous lichen. In Joshua Tree National Park, it is the most common of the biological soil crust lichens.
Brown stipplescale lichen Clavascidium lacinulatum (Placidium laciniatum) on shallow soil covering limestone on Moore's Hill Outcrop at FM Road 3090 near Navasota. Texas, February 2, 2019 FM 3090, Navasota, TX 77868, USA
Brown and green squamules of brown stipplescale lichen Clavascidium lacinulatum (Placidium laciniatum) on shallow soil covering limestone on Moore's Hill Outcrop at FM Road 3090 near Navasota. Texas, February 2, 2019 FM 3090, Navasota, TX 77868, USA
Brown stipplescale lichen Clavascidium lacinulatum (Placidium laciniatum) in wet condition (green) on shallow soil covering limestone on Moore's Hill Outcrop at FM Road 3090 near Navasota. Texas, February 2, 2019 FM 3090, Navasota, TX 77868, USA
Squamules of brown stipplescale lichen Clavascidium lacinulatum (Placidium laciniatum) on shallow soil covering limestone on Moore's Hill Outcrop at FM Road 3090 near Navasota. Texas, February 2, 2019 FM 3090, Navasota, TX 77868, USA