THE SOREDIATE PUNCTELIA SPECIES WITH LECANORIC ACID IN EUROPE

Abstract Abstract: A revision is presented of the sorediate, lecanoric acid-containing Punctelia species occurring in Europe. Two species are common in western and central Europe, viz. Punctelia subrudecta s. str. and Punctelia ulophylla comb. nov. They differ in several morphological characters, most notably in the colour and pruinosity of the margin. Both species occur sympatrically, often together on one tree. A third species, Punctelia perreticulata , is known in Europe only from the Mediterranean.