Descriptions and a Key to Cultivars of Japanese Cedar Cultivated in the Eastern United States

in HortTechnology
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  • 1 National Arborist Association (Blithewold Mansion and Gardens). Current address: 9 John Street, Narragansett, RI 02882.
  • | 2 Department of Horticultural Science, Box 7609, North Carolina State University, Raleigh, NC 27695-7609.

Japanese cedar, Cryptomeria japonica (Thunb. ex L.f.) D. Don [Cupressaceae Bartling, formerly assigned to Taxodiaceae Warm.] is increasing in popularity as a landscape plant in the eastern United States. A taxonomic study of cultivars grown in the eastern United States was conducted. Forty-five cultivars were recognized. Each cultivar bears synonymy, a quantitative morphological description newly described from field data, herbarium vouchers, references to original literature and observational notes. A glossary of taxonomic terms relevant to Cryptomeria is presented. A taxonomic key is presented for segregation of cultivars that should assist professional plantsmen in identification of taxa cultivated in the eastern United States.

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