Thomson, JW 1950: The species of Peltigera in North America north of Mexico. - Amer. Midland Nat.44(1): 1-68. [RLL List # 1 / Rec.# 18455] Keywords: PELTIGERA/ NORTH AMERICA/ NEW TAXA/ KEYS
Abstract: 15 fig. [12 species, 15 varieties, 13 forms. New: Peltigera malacea fo. prolifera fo. nov., P. membranacea fo. prolifera fo. nov., P. scabrosa fo. regenerana fo. nov.]