LichenIreland
  • Parmotrema reticulatum (Taylor) M.Choisy
Click on the thumbnails to enlarge the images
Parmotrema reticulatum
© Robert Thompson
Parmotrema reticulatum
© Robert Thompson
Parmotrema reticulatum
© Mike Simms
Parmotrema reticulatum
Click on map to open large map in new window
(Map updated: 11 August 2009)
 

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.

 

On first sight this large foliose lichen is not dissimilar to Parmotrema perlatum (described elsewhere). However, in P. reticulatum the lobes will be seen to be minutely cracked to form a net of tiny lines across the surface of the cortex. Some lobes are more intricately netted than others. A dusting of soredia is usually present on the ends of the turned-down lobe tips. The medulla (layer below the outer cortex), if exposed, should react K + yellow to red, Pd-. This species is frequent in Ireland, especially on isolated and wayside trees in the low-lying coastal areas and along the principal river valleys further inland.

Key characteristics

  • It is very similar to Parmotrema perlatum from which it is readily separated by the many distinctive hairline cracks that cross its surface
  • The medulla of P. perlatum reacts K + yellowy-orange only; Pd + orange.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Parmotrema reticulatum (Taylor) M.Choisy. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18894 Accessed on 2017-11-20.