oceanlis2000's picture

Unknown lichen

Observed: 25th April 2010 By: oceanlis2000oceanlis2000’s reputation in Fungi and Lichensoceanlis2000’s reputation in Fungi and Lichens
IMG_8714 (2).JPG

No identification made yet.

Species interactions

No interactions present.


gardener's picture

Either Caloplaca or

Either Caloplaca or Candelariella but you need to test with K - Caloplaca's give K+ red/purple, Candelariella's are K-

oceanlis2000's picture

Unknown lichen

Thanks for the comments Jenny

How do you test with potassium?

gardener's picture

Small eyedropper bottles can

Small eyedropper bottles can be bought from a chemist and then follow the instructions here for mixing: http://www.thebls.org.uk/content/chemical.html
(I use approx level teaspoon of caustic soda to 100ml of water)

To test apply a small drop onto the lichen and watch for a reaction. If your species is a Caloplaca you will get a very obvious crimson/purple reaction where you've applied the K.

OPAL's 'Lichen Guide' (http://www.opalexplorenature.org/?q=LichenGuide) links to an interactive slideshow showing how to spot test on slide 21:

If you're seriously interested in lichens Frank Dobson's 'Lichens - an illustrated guide to British and Irish species' is a must-have. Bit daunting to begin with but he gives the chemical reactions.

Species details on http://www.irishlichens.ie/index.html include the chemical spot test reactions.

Good luck!