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A Psilon is a unit of length that is equal to 44 manly strides or, less precisely, 0.025 miles (a quarter of a tenth of a mile) or 40 meters. The Psilon is best known as the official unit of measurement during the censusing of plants in the genus Silene (see Silene) in a metapopulation surrounding Mountain Lake Biological Station in Giles County, Virginia.
Etymology: Derived from the Latin Silene.
- Thrall, P.H. & Antonovics, J.A. : "THEORETICAL AND EMPIRICAL-STUDIES OF METAPOPULATIONS - POPULATION AND GENETIC DYNAMICS OF THE SILENE-USTILAGO SYSTEM", pg S1249-S1258 . Canadian Journal of Botany, 1995.
- D.E. McCauley. The Relative Contributions of Seed and Pollen Movement to the Local Genetic Structure of Silene alba, pg 257-263. Journal of Heredity, 1997
- "Echoes", the MLBS Newsletter (Fall/Winter 2010)[dead link]