Notes:
It is on rocky cliffs, stone blocks and talus along rocky volcanic hillocks minor in steppe.
This one is old and dry.
Young lichen is green moss-like as vertical cylinders with rare branching

Images

Aspicilia_T-1.jpg
Aspicilia_T.jpg

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So …
By: zaca
2016-06-09 08:11:14 PDT (-0700)

the habitat seems perfect for the existence of placodioid lichens. Do you have any hypothesis of making some microscopy?

Observations 241188 & 241277 are related with siliceous rocks.
By: Igor (Igor_Yevdokimov)
2016-06-09 08:05:49 PDT (-0700)

Observations 241188 & 241277 are located in the centre of Devonian volcano with intensive pyrite-sericite-quartz alteration. In Eocene time all rocks got additional silicification and some iron oxides (silicrete and ferricrete formations).

Thank you, Ygor.
By: zaca
2016-06-09 05:59:27 PDT (-0700)

Yes, that observation helps a lot. One can see that these are placodioid lichens (a placodioid lichen is a crustose lichen with a growth form that radiates out from a center, sometimes peeling up at the ends of the radial arms to have a leafy form, but without a cortex on the underside, like a foliose lichen). There is a genus – Placopsis – having species with this grow form. I only know two species (by name, since I suppose that they do not exist here): P. gelida and P. lambii. These are quite rare and restricted to specific habitats: siliceous rocks and boulders, iron-enriched, moist stones and slates in slate or slate-schists quarries, also on stones among mine wastes of ancient lead mines. Can you give details about the habitat of your observations?

Yours seem to be different, but fits quite well in this genus, taking also into account the apothecia that we can see at the center of the thallus in the first photo of observation 241277. Look to the following webpage for some more information:
http://www.lichensmaritimes.org/...
Sure you will find other informations in other websites. These are very nice ones!

This is a very distinctive one and
By: zaca
2016-06-08 13:54:12 PDT (-0700)

I would like to know more about it. Can you describe it in your own words, because I’m afraid that and don’t understand the photos. Particularly, the white dots are apothecia or are globose perithecia-like?