LITERATURE CITED
- Critchfield, W. B., and E. L. Little. 1966. Geographic distribution of the pines of the world. U. S. D. A. Misc. Publ. 991. 97 pp.
- Ridgway, R. 1912. Color standards and color nomenclature. Published by the author. Washington, D. C. 43 pp., 53 plates.
- Singer, R., and A. H. Smith. 1960. Studies on secotiaceous fungi. IX. The astrogastraceous series. Mem. Torrey Bot. Club 21(3): 1–112.