field dog lichen

Peltigera rufescens, commonly known as the field dog lichen or field pelt, is a species of terricolous (ground-dwelling), foliose lichen in the family Peltigeraceae. This common and widespread species has a cosmopolitan distribution, often found in dry, sunny habitats on basic soils, limestone, and nutrient-rich silicate substrates. The lichen forms rosettes up to 20 cm in diameter, with a grey to brown thallus densely covered with a soft, velvety tomentum. Its lobes, typically 3–5 cm long...