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Neil O. Anderson, Peter D. Ascher, Vincent Fritz, Charlie Rohwer, Steven Poppe, Shengrui Yao, Patricia Johnson, Lee Klossner, and Neal Eash

Another new garden chrysanthemum phenotype, the groundcover or prostrate plant habit, has been developed by the public sector University of Minnesota, Flower Breeding & Genetics Program. Winterhardiness and flowering before a killing frost were the first traits introduced by the breeding program with ‘Duluth’ in 1939 (Clark, 1962; University of Minnesota, Minnesota Agricultural Experiment Station, 2014); introduction of winter-hardy cultivars and genotypes has continued unabated ever since. Fall flowering remains a popular trait of all garden chrysanthemum types (Anderson, 2006; Dole and Wilkins, 2005). ‘Duluth’ has an upright plant habit (cut flower); such cultivars

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Neil O. Anderson, Steven Poppe, Peter D. Ascher, Esther Gesick, Shengrui Yao, David Wildung, Patricia Johnson, Vincent Fritz, James Hebel, Lee Klossner, Neal Eash, Barbara E. Liedl, and Judith Reith-Rozelle

Mammoth™ ‘Yellow Quill’ (U.S. Plant Patent 15,027; Canadian Plant Breeders’ Rights Certificate No. 2951) is a new interspecific garden chrysanthemum cultivar, Chrysanthemum ×hybridum Anderson (=Dendranthema ×hybrida Anderson) with common names of hardy mum, chrysanthemum, and garden mum. It is a new and distinct form of shrub-type garden mum in the Mammoth™ series with spoon-shaped ray florets, frost-tolerant flower petals, self-pinching growth, and serves as a butterfly attractant in the garden. Mammoth™ ‘Yellow Quill’ is a winter-hardy herbaceous perennial in USDA Zones 4–9 with its cushion growth form displaying extreme hybrid vigor, increasing

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Neil O. Anderson, Esther Gesick, Peter D. Ascher, Steven Poppe, Shengrui Yao, David Wildung, Patricia Johnson, Vincent Fritz, Charlie Rohwer, Lee Klossner, Neal Eash, Barbara E. Liedl, and Judith Reith-Rozelle

Mammoth™ ‘Twilight Pink Daisy’ (U.S. Plant Patent 14,455; Canadian Plant Breeders’ Rights Certificate No. 4192) is an interspecific garden chrysanthemum cultivar, Chrysanthemum ×hybridum Anderson (= Dendranthema ×hybrida Anderson) with common names of hardy mum, chrysanthemum, and garden mum. It is a new and distinct form of shrub-type garden mums in the Mammoth™ series with rosy-pink ray florets, a dark “eye” color in the center of the disc florets, frost-tolerant flower petals, and self-pinching growth. This cultivar is a butterfly attractant in the garden. Mammoth™ ‘Twilight Pink Daisy’ is a winter-hardy herbaceous perennial in USDA Z3b–Z9 (Southeast)/Zone 10 (West) with its cushion growth form displaying extreme hybrid vigor, increasing in plant height from 0.46 m in its first year to a shrub of 0.76 to 1.22 m in the second year and thereafter with greater than 3000 leaves/plant. Flowering is prolific, covering the entire plant at full flowering with as many as greater than 3500 flowers in the second year. Chemical abbreviations: ethanol (EtOH), indole-3-butyric acid (IBA).