New and rare plant species in the south of Siberia (Krasnoyarsk Territory, the Republics of Tyva and Khakassia)

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Abstract
Through field research, analysis of previously published works, and review of materials stored in the NS collection funds, information on the distribution of rare alien and native plant species in the Krasnoyarsk Territory and the Republics of Tyva and Khakassia was refined. Caragana microphylla, Hieracium chamardabanense, and Leymus pubescens were recorded for the first time in the flora of the Republic of Tyva, while Campanula punctata, C. rapunculoides, Parthenocyssus inserta, Psephellus dealbatus, and Rubus allegheniensis were recorded in the flora of the Republic of Khakassia. New locations were identified and range boundaries were clarified for six alien species rare in Southern Siberia: Calystegia inflata, Campanula punctata, C. rapunculoides, Parthenocyssus vitacea, Psephellus dealbatus, and Rubus allegheniensis. Polygonum rurivagum was recorded for the first time in the Western Sayan mountain range, in the Yenisei Valley, at four locations, and Allium malyschevii was found in the Sengelen Highlands in the Tarys River valley. A population of Fritillaria dagana, listed in the Red Data Books of the Russian Federation and the Republic of Tyva, was discovered in the Azas Nature Reserve, distinguished by a high abundance of both vegetative and generative shoots. Potentilla inclinata was recorded for the first time in “Shushensky Bor” National Park.

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