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  • Author or Editor: Yulia A. Kuzovkina x
  • HortScience x
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The long history of Salix L. cultivation has resulted in selections of cultivars with superior technical and ornamental characteristics. Numerous cultivars have been developed and named over the centuries, but until now, no comprehensive compilation of these records has ever been made. With the expanding domestication of the genus Salix and the active selection of new cultivars, it is increasingly important that we have clear and standardized records documenting the cultivars. In 2013, the International Poplar Commission of the Food and Agriculture Organization (IPC FAO) was appointed as the International Cultivar Registration Authority (ICRA) for willows. The Checklist for Cultivars of Salix was compiled as the first step toward the promotion of a standardized registration process and the establishment of a Cultivar Register for Salix. Eight hundred and fifty four cultivar epithets with accompanying information have been included in the Checklist. The largest group of cultivars—more than 200—is represented by basket selections. This is followed by selections for ornamental plantings and biofuel production. The Checklist aims to promote the uniformity and accuracy of cultivar names of Salix, and provides a baseline for new registrations to ensure that each newly developed cultivar receives a unique, authoritative botanical name.

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The International Poplar Commission, FAO UN, was appointed to serve as the International Cultivar Registration Authority for the genus Salix in 2013 (). Eight hundred and fifty-four cultivar epithets were included in the Checklist for Cultivars of Salix (Willow) to provide the baseline for the formal registration of new cultivars epithets (, ). Twenty-six new cultivar epithets have been registered since 2016 and included in the .

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Salix gracilistyla Miq., japanese pussy willow or rosegold willow, is an ornamental shrub commonly cultivated for its prominent display of catkins in early spring. Verification of stocks of willows in the North American landscape nursery trade revealed that another name—Salix chaenomeloides Kimura—is associated frequently with plants similar to S. gracilistyla. Morphological analyses conducted during this study have shown that the S. chaenomeloides binomial is misapplied often to S. gracilistyla, its cultivars and hybrids. A comparison of the diagnostic characters of S. gracilistyla and S. chaenomeloides is presented to explain the differences between these taxa and to promote the adoption of the correct names. Five cultivars of S. gracilistyla valued for their early spring catkin displays, variegated foliage, and pendulous habits, and two cultivars of a hybrid origin are summarized. Also, two new ornamental cultivars called Salix ‘Winter Glory’ and Salix ‘Rabbit’s Foot’ are described.

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