New and rare alien species for the Republic of Khakassia.
In July 2016 authors of this article made a field trip to Khakassia Republic. The main aim of this field trip was to check and correct the list of alien plant species and their distribution in the Republic (including invasive plants). Seven from eight administrative districts (excluding Tashtyp district) were visited along the main highways and side roads. Also six railroad sections were examined in Askiz, Bograd and Shira administrative districts. Special attention was paid to some popular touristic places. Also some crop fields and abandoned agricultural fields of the different age were visited. As a result of special investigations in the Republic of Khakassia, 11 alien plant species and one interspecific hybrid were recorded there for the first time, namely Aconogonon divaricatum, Atriplex tatarica, Centaurea pseudomaculosa, Cichorium intybus, Epilobium pseudorubescens, Gypsophila paniculata, Lotus corniculatus, Medicago × varia, Oenothera villosa, Portulaca oleracea, Rumex stenophyllus, and Silene dichotoma. Also information about distribution of 20 others rare aliens and invasive plant species are added. The article provides an annotated list of new and rare species with exact geographical coordinates for each collected sample. For some species an additional information about their distribution based on field observations in nature is given. Names of alien plant species are given according to "Check-list of the flora of Asian Russia" (Konspekt..., 2012). The collected samples are stored in the herbarium TK and KUZ; doublets were transferred to ALTB.