Species and Population Variability of Osmorhiza Longistylis and Osmorhiza Claytonii
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Citation:The Ohio Journal of Science. v80, n2 (March, 1980), 91-95
Four populations of Osmorhiza, containing either or both 0. longistylis and O. claytonii (Sweet Cicely), were sampled to determine interspecific and intraspecific patterns of morphological variation. Discriminant analysis permitted easy separation of the species when presence or absence of anise scent was used as a criterion variable. The same method permitted separation of 2 populations of 0. longistylis yet did not completely separate 2 populations of 0. claytonii. Significant differences were found for a variety of characters between the 2 populations of 0. claytonii as well as between the 2 0. longistylis populations and between the species. Style length and anise scent were recognized as reliable species indicators whereas pubescence characters were unreliable. Population differences are presumed to be the result of habitat differences, while species differences are apparently genetic.
Author Institution: Department of Biological Sciences, Wright State University
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