Both cultivars were developed to preserve the genetic diversity of Helianthus verticillatus while providing new options for growers and conservationists. 'Denita's Autumn Sunshine' is distinguished by its bright golden blooms and vigorous growth, while 'Bonnie's Purple Majesty' features some red-purple-hued stems not found in the Denita cultivar. Both cultivars have relatively small bright golden blooms that are considerably smaller than the "typical" sunflower. Each cultivar maintains the species' resilience and adaptability, thriving in a variety of growing conditions while supporting pollinators and ecological restoration initiatives.
By introducing these cultivars, researchers and horticulturists aim to promote the cultivation of Helianthus verticillatus beyond its native range, ensuring its continued presence in both natural and managed landscapes. These efforts contribute to broader conservation strategies while providing gardeners with visually stunning and ecologically beneficial plants.
According to the author, "Our team embraces the Land Grant Mission (Philosophy): solving disease and production problems and developing new plant materials for our ornamental plant growers. To this end, we have developed numerous disease resistant flowering dogwood cultivars, which are now being grown by nurseries as well as some unique kousa dogwood cultivars. Additionally, the two sunflower cultivars featured in this article were developed for the preservation of this endangered species."
Dr. Trigiano is Chancellor's Professor at the University of Tennessee-Knoxville. He works on genomics, population genetics, propagation of endangered plants, diseases of ornamentals, and molecular marker systems for various plants and pathogens.
The full articles can be found on the ASHS HortScience electronic journal website at:
https://doi.org/10.21273/HORTSCI17640-23 and https://doi.org/10.21273/HORTSCI18387-24
Established in 1903, the American Society for Horticultural Science is recognized around the world as one of the most respected and influential professional societies for horticultural scientists. ASHS is committed to promoting and encouraging national and international interest in scientific research and education in all branches of horticulture.
Comprised of thousands of members worldwide, ASHS represents a broad cross-section of the horticultural community - scientists, educators, students, landscape and turf managers, government, extension agents and industry professionals. ASHS members focus on practices and problems in horticulture: breeding, propagation, production and management, harvesting, handling and storage, processing, marketing and use of horticultural plants and products. To learn more, visit ashs.org.
