and some other botanists. Most of the revealed specimens are isotypes, isolectotypes, and syntypes, but the type status of some specimens should be reassessed. The role of the JSTOR Global Plants and other large-scale herbarium digitization projects is emphasized. The growing online availability of historical taxonomic publications is also crucial for current taxonomic research. Collections of the Turczaninow herbarium and their possible sources are briefly characterized. It is also concluded that a special project is much needed for proper preservation, digitization, and scientific assessment of the vast Turczaninow's collection, which contains numerous historical specimens (including many types) of great importance for plant taxonomy worldwide.

The genus Reynoutria includes ca. six species native to East Asia. Hybridization is rather common in this genus. The hybrid Reynoutria ×bohemica Chrtek & Chrtková is currently widespread in Europe, Asia, North and partly South America, Australia and New Zealand. A hybrid between Fallopia compacta (Hook. f.) G.H. Loos & P. Keil and F. sachalinensis (F. Schmidt) Nakai was described recently as Fallopia ×moravica Hodálová & Mereďa. Since we accept the genus Reynoutria as separate from Fallopia, we propose a new combination for this hybrid: Reynoutria ×moravica (Hodálová & Mereďa) Olshan­skyi & Antonenko, comb. nov.

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