Growth Rate
Xanthoria elegans was one of the first species used for lichenometry, a technique of estimating the age of rock faces by measuring the diameter of the lichen thalli growing on them. After an initial period of one or two decades to establish growth (the ecesis interval), X. elegans grows at a rate of 0.5 mm per year for the first century, before slowing down somewhat.
Read more about this topic: Xanthoria Elegans
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