Chemical races of Cladonia cariosa and C. symphycarpa (lichenized Ascomycota) - a Polish case study in a worldwide context
Osyczka, Piotr; Skubała, Kaja
The paper presents the results of a chemical survey dealing with the two most common species of the so-called Cladonia cariosa group. The study is based on Polish collections and selected specimens representing different areas of the world. Nine chemical races of Cladonia cariosa and six of C. symphycarpa are recognized. New data on the chemical compositions are given for previously known chemotypes of these species. Races with norstictic and psoromic acids are confirmed for C. cariosa; four main chemical variations of C. symphycarpa might thus also occur in the first species. Rangiformic acid proved to be a frequently occurring substance in various chemical combinations of C. cariosa, while this fatty acid is not produced by C. symphycarpa. On the contrary, bourgeanic acid only appears in C. symphycarpa. Five chemical races of C. cariosa are recorded in Poland, while the second species is chemically homogenous in the country. Some observations on the global distribution of identified chemotypes are included in the discussion.