48Memoranda Soc. Fauna Flora Fennica 97:Sennikov 48–63. et2021 al. • Memoranda Soc. Fauna FloraISSN Fennica 0373-6873 97, (print)2021 Helsinki 31 July 2021 ISSN 1796-9816 (online) Personalities of Russian amateur botany, 3. Ivan M. Schvetzov and Theodor S. Nenukow, prominent experts in the flora of Nizhni Novgorod Region, and the taxonomic identity of plant species described by Nenukow Alexander N. Sennikov, Valery N. Tikhomirov, Olga V. Biryukova & Ilya L. Mininzon Sennikov, A.N., Botanical Museum, Finnish Museum of Natural History, University of Helsinki, Finland & Herbarium, Komarov Botanical Institute of Russian Academy of Sciences, St Petersburg, Russia.
[email protected] Tikhomirov, V.N., Belarusian State University, Minsk, Belarus. Biryukova, O.V. & Mininzon, I.L., Nizhni Novgorod State University, Russia. Ivan Schvetzov collected many specimens of vascular plants, fungi, mosses and lichens mostly from the western part of Nizhni Novgorod Region of Russia, including the original collections of Cytisus ruthenicus var. zingeri Nenukow. Theodor Nenukow was a prominent amateur bota- nist from Nizhni Novgorod. He studied the flora of Nizhni Novgorod Region, weed and meadow flora of Central Russia and vascular plants of Estonia. He described a few infraspecific taxa and two species of vascular plants, Valeriana estonica Nenukow (synonymised here with V. officinalis subsp. tenuifolia (Vahl) Schübl. & G.Martens) and Odontites estonicus Nenukow (a synonym of O. vulgaris Moench), and the basionym for Cytisus zingeri (Nenukow) V.I.Krecz. (a glabrous variety of C. ruthenicus Fisch. ex Otto). The places of valid publication are clarified for C. ruthenicus var. zingeri and Persicaria linicola, and the lectotype is designated for C.