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A new species of Erigeron (Asteraceae) and its relatives in southwestern Utah

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Abstract

A narrow endemic of southwestern Utah,Erigeron flagellaris A. Gray var.trilobatus Maguire ex Cronq., is given specific status asErigeron proselyticus Nesom. It is closely related to two other rare endemics of the Zion National Park area,Erigeron religiosus Cronq. andErigeron sionis Cronq., but it does not share a similarly close relationship with typicalE. flagellaris. Erigeron proselyticus is diploid;E. sionis is tetraploid and probably agamospermic; three diploid populations and several triploid populations ofE. religiosus are known, including a population of triploids from the site of a paratype collection of this species. Variation in these triploids suggests the possibility of hybridization withErigeron divergens Torr. & Gray, or with an unknown species no longer occurring sympatrically withE. religiosus.

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Literature Cited

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Authors and Affiliations

  1. Department of Botany, University of North Carolina, 27514, Chapel Hill, NC

    Guy L. Nesom

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  1. Guy L. Nesom
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Additional information

A portion of a thesis submitted as partial fulfillment of requirements for the Master of Arts degree, Department of Botany, University of North Carolina, Chapel Hill. Most of this research was conducted while receiving financial assistance from a NSF Traineeship, GZ920. Dr. C. R. Bell, Dr. J. R. Massey, and Dr. A. E. Radford critically read the manuscript and offered suggestions, and their help is gratefully acknowledged.

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Nesom, G.L. A new species of Erigeron (Asteraceae) and its relatives in southwestern Utah. Brittonia 28, 263–272 (1976). https://doi.org/10.2307/2805837

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  • DOI: https://doi.org/10.2307/2805837

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