This foliose lichen is rare, but easily recognised on account of its small, yellow-grey to greenish thallus (1-3cm diam.) and spots of yellow, powdery soredia on the lobes and lobe ends. It resembles a slightly smaller but more robust version of the rock-dwelling lichen Xanthoparmelia mougeotii (K+ orange medulla) attached to acid bark in the shape of a star. The species needs to be searched for more vigorously as it has only been recorded in Counties Antrim and Cork. It favours conifers such as larch and pine but will also grow on broadleaved trees in areas prone to bark acidification.
Original text submitted by Vince J. Giavarini
Simms, M. J., (2016). Parmeliopsis ambigua (Wulfen) Nyl.. [In] LichenIreland. http://www.habitas.org.uk/lichenireland/species.asp?item=18483 Accessed on 2019-02-23. |