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A comparison of numerical and biosystematic studies in Haplopappus

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Abstract

Numerical phenetics, based on indiscriminate choice of characters and equal weighting, does not directly reflect cladistic or lineage relationships in some taxa ofHaplopappus. However, the degree to which the lineage and phenetic relationships diverge may be used as an assay of the amount of parallel evolution that has occurred. Several numerical taxonomic methods were employed. For each method a change in the number of characters from 31 to 29, by deletion of two karyotypic characters, yielded a significant change in the results. Uses of numerical techniques for the study of character dines and adaptive character complexes are discussed.

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Authors and Affiliations

  1. Botany Dept., University of Kansas, Lawrence

    R. C. Jackson

  2. Biology Dept., University of Notre Dame, Notre Dame, Indiana

    T. J. Crovello

Authors
  1. R. C. Jackson
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  2. T. J. Crovello
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Additional information

This study was aided in part by NSF grants GB-14827, -7751, and -3071 to R. C. Jackson.

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Jackson, R.C., Crovello, T.J. A comparison of numerical and biosystematic studies in Haplopappus. Brittonia 23, 54–70 (1971). https://doi.org/10.2307/2805842

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