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Research ArticleRefereed Research

Conservation and re-establishment of Florida panhandle goldenasters (Chrysopsis): I. Reproduction characteristics and germination requirements

Natalie Hooton Graves, Gabriel Campbell-Martínez, Mack Thetford, Debbie Miller and Sandra Wilson
Native Plants Journal, September 2021, 22 (3) 315-322; DOI: https://doi.org/10.3368/npj.22.3.315
Natalie Hooton Graves
University of Florida Presently Environmental Project Manager Antero Resources 1615 Wynkoop Street Denver, CO 80202
Roles: Former Graduate Research Assistant
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  • For correspondence: [email protected]
Gabriel Campbell-Martínez
University of Florida west Florida Research and Education Center 5988 Highway 90. Building 4900 Milton, FL 32583
Roles: Former Graduate Research Assistant
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Mack Thetford
University of Florida West Florida Research and Education Center 5988 Highway 90, Building 4900 Milton, FL 32583
Roles: Associate Professor of Environmental Horticulture
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Debbie Miller
University of Florida West Florida Research and Education Center 5988 Highway 90, Building 4900 Milton, FL 32583
Roles: Professor of Wildlife Ecology and Conservation
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Sandra Wilson
University of Florida/IFAS PO Box 110670 Gainesville, FL 3261
Roles: Professor of Environmental Horticulture
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Abstract

Goldenasters (Chrysopsis (Nutt.) Elliott [Asteraceae]) are southeastern US native sunflowers that are important components of imperiled plant communities. However, information is limited regarding their conservation and restoration. We investigated reproduction characteristics and germination requirements for 3 Chrysopsis taxa: 2 forms of Godfrey’s goldenaster (Chrysopsis godfreyi Semple f. godfreyi and Chrysopsis godfreyi f. viridis Semple) and Cruise’s goldenaster (Chrysopsis gossypina ssp. cruiseana (Dress) Semple). The total number of inflorescences per plant, heads per inflorescence, heads per plant, and seeds per head were counted for plants growing in coastal back dunes in the Florida panhandle. The number of seeds per plant was estimated. Initial viability and germination tests were conducted by a seed testing laboratory. Effects of photoperiod (0 or 12 h) and temperature on germination were also evaluated. Reproductive characteristics did not differ among the 3 taxa, but there were differences in seed viability and germination. Seeds of C. godfreyi f. viridis and C. gossypina ssp. cruiseana had high (>70%) viability compared to C. godfreyi f. godfreyi (<50%). We observed a significant interaction between temperature and light for all 3 taxa. The highest germination percentages (50–56%) for C. godfreyi f. godfreyi were recorded in winter and early spring/late fall temperatures with light. Similarly, the highest germination percentages (58–71%) for C. godfreyi f. viridis and C. gossypina ssp. cruiseana were recorded in winter, early spring/late fall, and early fall/late spring temperatures in light. We recommend collecting seeds in the late fall to winter and immediately sowing with light exposure.

KEY WORDS
  • Godfrey’s goldenaster
  • Cruise’s goldenaster
  • seed viability
  • coastal dune restoration
  • Asteraceae
NOMENCLATURE
  • Semple (1981)
  • USDA NRCS (2019)
  • Copyright © 2021 the Board of Regents of the University of Wisconsin System

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Native Plants Journal: 22 (3)
Native Plants Journal
Vol. 22, Issue 3
21 Sep 2021
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Conservation and re-establishment of Florida panhandle goldenasters (Chrysopsis): I. Reproduction characteristics and germination requirements
Natalie Hooton Graves, Gabriel Campbell-Martínez, Mack Thetford, Debbie Miller, Sandra Wilson
Native Plants Journal Sep 2021, 22 (3) 315-322; DOI: 10.3368/npj.22.3.315

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Conservation and re-establishment of Florida panhandle goldenasters (Chrysopsis): I. Reproduction characteristics and germination requirements
Natalie Hooton Graves, Gabriel Campbell-Martínez, Mack Thetford, Debbie Miller, Sandra Wilson
Native Plants Journal Sep 2021, 22 (3) 315-322; DOI: 10.3368/npj.22.3.315
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Keywords

  • Godfrey’s goldenaster
  • Cruise’s goldenaster
  • seed viability
  • coastal dune restoration
  • Asteraceae
  • Semple (1981)
  • USDA NRCS (2019)
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