• Buellia excelsa (Leight.) A.L.Sm.
Buellia excelsa
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Buellia subdisciformis (K+yellow-red), one of the most frequent lichens of siliceous rocky shores resembles a larger version of this very rare species. When searching for B. excelsa (K+ yellow, Pd-) it is best to spot test candidates with K. A squash of the disc should reveal the presence of numerous oil droplets; spores 11-15ųm long. In Ireland, it is known from the Mount Doughruagh area of Connemara, County Galway.

Key characteristics

  • The white areolate, warted crust of this lichen is a miniature version of B. subdisciformis. It could also be confused with Amandinea lecideina. Neither of these lookalikes is K+ yellow
  • Siliceous rocks.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Buellia excelsa (Leight.) A.L.Sm.. [In] LichenIreland. Accessed on 2018-08-16.