Physiography and Fumarprotocetraric Acid Production in the Cladonia chlorophaea Group in North Carolina

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Abstract
In the C. chlorophaea group in North Carolina [USA], consisting of 6 sibling species [C. grayi, C. cryptochlorophaea, C. merochlorophaea, C. perlomera, C. conista, C. chlorophaea] characterized by natural-product chemistry, 3 spp. produce fumarprotocetraric acid as a constant constituent and 2 spp. as an accessory substance. Fumarprotocetraric acid production in the species group as a whole decreases from the [Blue Ridge] Mountains through the Piedmont to the Coastal Plain.