North America, Europe (Russia), Asia. Species 2 (1 in the flora). Penthorum chinense Pursh is known from European Russia and Asia. None. Penthorum sedoides
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Freeman Common names: Chinese knotweed Introduced Basionym: Polygonum chinense Linnaeus Sp. Pl. 1: 363. 1753 Treatment appears in FNA Volume 5. Treatment
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Illustrated Synonyms: Xanthium americanum Walter Xanthium chasei Fernald Xanthium chinense Miller Xanthium curvescens Millspaugh & Sherff Xanthium cylindricum Millspaugh
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have been introduced to horticulture, and the hybrid L. tulipifera × L. chinense is known. Liriodendron tulipifera is reported to have escaped from cultivation
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hybrid R. ×centifolia Linnaeus in sect. Gallicae. Two species of sect. Chinenses de Candolle ex Seringe, both cultivated in warmer areas, are reported as
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