Peltigera
28 species
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Peltigera rufescens
Description: Thallus grey to brownish, heavy tomentum on upper surface of lobes. Rhizines abundant, forming a mat. Apothecia red-brown, common.
Distribution: Washington; Alaska to northern California, Idaho, Montana, North Dakota to Maine, south to Missouri and Maryland; Canada.
Habitat: In full sun.
Substrate: Dry, sandy, calcareous soils.
Peltigera venosa
Description: Thallus deep green to dark grey-green, lobes fan-shaped or rounded to 15 mm. Lower surface white marked by raised black veins, rhizines absent.
Distribution: Washington; Alaska to northern California, Idaho, Montana, Wyoming, Utah, Colorado, New Mexico, Michigan, New York, Maine, New Hampshire; northern Canada, to US border in British Columbia, Alberta, Ontario, Quebec.
Habitat: Moist, shaded areas in regions with high rainfall.
Substrate: Mineralized soil.