Observation 82311: Lichen P. Micheli

I know nothing about lichen, but thought others may be interested. This was growing on granite, near the coast in Cape Le Grand National Park (Frenchman Peak) in the south west of WA. It was pale green to grey in colour. I’m not sure whether there is one or two different lichens in some of these photos.

I don’t have a macro lens, so I’ve digitally zoomed in on these images on the computer. I’ve also sharpened the images a little where necessary to improve the focus.


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Wow . . .
By: Mark Price (marksandyleucapops@gmail.com)
2011-11-22 09:51:15 CST (-0500)

that’s very cool! Thanks for all the info you’ve provided on these and other posts.

Multiple species
By: Jason Hollinger (jason)
2011-11-16 21:15:26 CST (-0500)

There are at least three species here the way I see it:

The gray one in the second and third photos is Punctelia (white dot-like spots over steel-gray shiny surface secure the genus; the coarse soredioid-isidia should presumably get you to species if you have a key for your region; chemistry and/or color of lower surface might be important, as well).

The green one in the second and third photos is probably Xanthoparmelia. You have tons of species we don’t have in North America, but for whatever it’s worth, it looks like X. mexicana, a species which does occur in Australasia.

The gray one in the first and last… I’m not sure. If the gray color is just a problem with white-balance in the camera, it could be a Xanthoparmelia, as well (but I don’t think it’s isidiate, so it can’t be the same as the other). There are other Parmeliaceae with gray unmarked surface with approximately this shape, though. Hypotrachyna is one remote possibility. There might be other genera down there I’ve never even heard of.