Peltigera granulosa

Peltigera granulosa is a species of terricolous (ground-dwelling), foliose lichen in the family Peltigeraceae. Found in Papua New Guinea, it was formally described as a new species in 2009 by Emmanuël Sérusiaux, Bernard Goffinet, Jolanta Miądlikowska, and Orvo Vitikainen. The type specimen was collected from open grassland between Gumum and Sape villages (Morobe Province), where it was found growing on sand. The species epithet granulosa refers to its characteristic margin.

Description
This lichen has a thin, fragile thallus with elongated that are often erect when growing on mossy ground. The upper surface is smooth and shiny, bluish grey or brownish to dark brown, with some parts covered in a delicate white powder. The lower surface is whitish near the margins and becomes blackish towards the centre or in old specimens, with strongly raised and dark veins. Apothecia are few and only found on erect lobes, while pycnidia are and black. are and straight, with rounded ends and 5–7 septa.

Habitat and distribution
Peltigera granulosa is a pioneer species that primarily grows on bare ground such as sand or gravel, as well as on plant debris and peat. It can be found in both natural and artificial habitats such as road banks, and mossy soils in the montane forest zone. Although it can occur on mossy trunks within forests, it typically forms smaller and less noticeable individual lobes in these environments. Its distribution ranges from 1300 to 3660 m elevation.