Ornamental crabapples (Malus sp.), which are shrubs or small trees in the rose family (Tang et al. 2015), have a long history of cultivation and are well-known as the “national beauty” in China (Pang 2008). The plants are popular ornamentals because of their diversity of habit, including columnar, fastigiate, upright, spreading, drooping, and weeping; various flower colors, such as white, pink, red, and purple; colorful foliage, such as yellow-green, green, gradient, red-brown, purple; and gorgeous autumn and winter fruit displays (yellow, green, orange, red, purple). They are also welcomed and frequently planted in landscaping for both their beauty, and their wide environmental adaptability and stress tolerance (Fan et al. 2019).
After many years of continuous hybridization and selection work, more and more new varieties of excellent ornamental crabapples have been introduced to the market, including ‘Zi Yan’ (He et al. 2017), ‘Chang Hui’ (Hu et al. 2018), ‘Duo Jiao’ (Zhang et al. 2019), and ‘Jingxiu Hong’ (Sha et al. 2021). The breeding trend for flowering crabapples continues to be new varieties with unusual flower shapes, double petals, and novel flower colors.
Yunjuan Yunshu is a new cultivar selected and released for its excellent double flowers and bright red and purple petals arranged as a distinctive daisy flower shape.
Agricultural Research Service, US Department of Agriculture 2012 USDA plant hardiness zone map Agricultural Research Service, US Department of Agriculture USA
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Sha GL, Ge HJ, Huang E, Ma RQ, Zhang CL & Sun HT. 2021 Breeding of a new ornamental crabapple variety ‘Jinxiu Hong’ Zhongguo Guoshu. 06 61 https://doi.org/10.16626/j.cnki.issn1000-8047.2021.06.013
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