Respected Sir,
I don't have much knowledge about lichens, but please find the attachment. It is one of my class notes related to it. If it gives you any guidelines, refer net accordingly.
Good Luck
The attachment of Dr. Tresina Soris P is quite helpful. The spot test (reagents K, C, KC, etc) is always used in the identifications keys. At first you should find an adequate identification key depending on where you collected your lichen samples and also which family they belong to, e.g. samples of North Amerika use the book "Lichens of North Amerika" or lichens of the family graphidaceae use keys of the author Robert Lücking. Microcrystalisationtest is not a common test, it´s nice,but you need special literature and at the end it is only an additional method to the other ones. We also use the secondary metabolites for the identification of lichen species, this is very common. Therefore, you have to perform TLC (thin layer chromatography) or HPLC (high Performance liquid chromatography). Good literature for the identification of the metabolites is e.g. for TLC you can use literature of the author Culberson, for HPLC and TLC you can use the book Huneck, S. & Yoshimura, I. (199) Identification of lichen substances. Springer Verlag.
You could also begin your inquiry with Dr. Clifford Wetmore's website of the University of Minnesota’s Bell Museum & Dept. of Plant Biology who has spent a lifetime studying lichens worldwide. His online key to the Lichens of Minnesota is quite extensive and could the starting point for your research.
http://www.tc.umn.edu/~wetmore/Herbarium/MNKEYS.pdf
http://www.cbs.umn.edu/explore/departments/plantbio/faculty-research/faculty-directory/cliffordwetmore
I can give you these books : http://link.springer.com/search?facet-content-type=%22Book%22&query=lichen+&sortOrder=newestFirst
Dr.Clifford Wetmore's key to the Lichens of Minnesota has been moved to:
https://conservancy.umn.edu/handle/11299/156243
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