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The Chinese chestnut ( Castanea mollissima  Blume) and other  Castanea  species ( Castanea  spp. Mill.) have been imported and circulated among growers and scientists in the United States for more than a century. Initially, importations of  C. mollissima  after 1914 were motivated by efforts to restore the American chestnut [ Castanea dentata  (Marsh.) Borkh.], with interests in timber-type characters and chestnut blight resistance. Chestnut for orchard nut production spun off from these early works. Starting in the early 20th century, open-pollinated seeds from seedlings of Chinese chestnut and other  Castanea  species were distributed widely to interested growers throughout much of the eastern United States to plant and evaluate. Germplasm curation and sharing increased quite robustly through grower networks over the 20th century and continues today. More than 100 cultivars have been named in the United States, although a smaller subset remains relevant for commercial production and breeding. The University of Missouri Center for Agroforestry curates and maintains a repository of more than 60 cultivars, and open-pollinated seed from this collection has been provided to growers since 2008. Currently, more than 1000 farms cultivate seedlings or grafted trees of the cultivars in this collection, and interest in participatory on-farm research is high. Here, we report descriptions of 57 of the collection’s cultivars as a comprehensive, readily accessible resource to support continued participatory research.

Descriptions of Chestnut Cultivars for Nut Production in the Eastern and Midwestern United States