Aptroot, A 2003: A new perspective on the sorediate Punctelia (Parmeliaceae) species of North America. - The Bryologist106(2): 317-319. [RLL List # 191 / Rec.# 24592] Keywords: NORTH AMERICA/ PUNCTELIA
Abstract: 1 fig. [Reinterpretation of several taxa. Provides a key to North American and European species.]