In past times this common foliose lichen was the wool-dyer's ‘crottle’. The thallus which forms neat, grey to grey-green rosettes on acid-barked trees and rocks has square-scalloped lobe ends, covered in a net of fine white lines (best seen along the edge of the plant) surmounted by a dense mass of stick-shaped outgrowths (isidia).
Original text submitted by Vince J. Giavarini
Vince J. Giavarini, (2016). Parmelia saxatilis (L.) Ach.. [In] LichenIreland. http://www.habitas.org.uk/lichenireland/species.asp?item=18897 Accessed on 2022-08-11. |