LITERATURE CITED
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- Culberson, C. F. 1970. Supplement to “Chemical and botanical guide to lichen products.” Bryologist 73: 177–377.
- Culberson, C. F., and H. Kristinsson. 1970. A standardized method for the identification of lichen products. J. Chromatogr. 46: 85–93.
- Culberson, W. L. 1970. Chemosystematics and ecology of lichen-forming fungi. Annual Review of Ecology and Systematics 1: 153–170.
- Follmann, G., and S. Huneck. 1969. Mitteilungen über Flechteninhaltsstoffe LXXI. Zur Phytochemie und Chemotaxonomie der Diploschistaceae. Bot. Jahrb. 89: 344–352.
- Hale, M. E., Jr. 1967. The Biology of Lichens. Edward Arnold, London. 176 p.
- Zahlbruckner, A. 1930. New species of lichens from Porto Rico. III. Mycologia 22: 69–79.
- Zopf, W. 1907. Die Flechtenstoffe in chemischer, botanischer und pharmakologischer Beziehung. Gustav Fischer, Jena. 449 p.