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The genusAntennaria (Asteraceae: Inuleae) in western North America: Morphometric analysis ofAntennaria alborosea, A. corymbosa, A. marginata, A. microphylla, A. parvifolia, A. rosea, andA. umbrinella

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Abstract

Multivariate analysis of vegetative and reproductive characters was used to examine morphological relatedness amongAntennaria alborosea A. E. Porsild,A. corymbosa E. Nels.,A. marginata Greene,A. microphylla Rydb.,A. parvifolia Nutt.,A. rosea Greene, andA. umbrinella Rydb. Both pistillate and staminate plants were examined. Some of the characters examined were variable in one species, but stable in another (i.e., presence or absence of papillae on the achenes). Our analyses indicate that the seven species are morphologically distinct. It is hypothesized that theA. rosea agamic complex arose through hybridization amongA. corymbosa, A. microphylla, A. umbrinella, and possiblyA. dioica (L.)Gaertn. However, hybridization between the three former species and others, as well as their subsequent morphological responses to different environmental conditions causes confusion in recognizing the taxa.Antennaria angustifolia Rydb.,A. arida E. Nels.,A. confinis Greene,A. scariosa E. Nels.,A. foliacea humilis Rydb.,A. concinna E. Nels., andA. viscidula E. Nels. are considered to represent F 1 hybrids.

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Authors and Affiliations

  1. Department of Biological Sciences, University of Calgary, T2N 1N4, Calgary, Alberta, Canada

    J. G. Chmielewski & C. C. Chinnappa

  2. Department of Biology, University of Waterloo, Waterloo, Ontario, Canada

    J. C. Semple

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  1. J. G. Chmielewski
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  2. C. C. Chinnappa
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  3. J. C. Semple
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Chmielewski, J.G., Chinnappa, C.C. & Semple, J.C. The genusAntennaria (Asteraceae: Inuleae) in western North America: Morphometric analysis ofAntennaria alborosea, A. corymbosa, A. marginata, A. microphylla, A. parvifolia, A. rosea, andA. umbrinella . Pl Syst Evol 169, 151–175 (1990). https://doi.org/10.1007/BF00937673

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