Review of Orchidaceae of the northern part of Kazakhstan Author Kubentayev, Serik A. https://orcid.org/0000-0002-0369-0591 Astana Botanical Garden, 16 Orynbor Str., 010016, Astana, Kazakhstan Author Efimov, Petr G. https://orcid.org/0000-0003-2926-255X Komarov Botanical Institute of the Russian Academy of Sciences, 2 Professor Popov Str., 197022, Saint-Petersburg, Russia Author Alibekov, Daniyar T. https://orcid.org/0000-0003-1555-1430 Astana Botanical Garden, 16 Orynbor Str., 010016, Astana, Kazakhstan Author Kupriyanov, Andrey N. https://orcid.org/0000-0001-5602-2012 Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, 18 Sovetsky Ave., 650000, Kemerovo, Russia Author Izbastina, Klara S. https://orcid.org/0000-0002-6418-1950 Astana Botanical Garden, 16 Orynbor Str., 010016, Astana, Kazakhstan & S. Seifullin Kazakh Agrotechnical Research University, 62 Zhengis Ave., 010000, Astana, Kazakhstan Author Khalymbetova, Aizhan E. https://orcid.org/0000-0002-2584-4766 L. N. Gumilyov Eurasian National University, 2 Satpayev Str., 010000, Astana, Kazakhstan usensultanbakytzhanuly@gmail.com Author Perezhogin, Yuri V. https://orcid.org/0000-0001-6997-8347 A. Baitursynov Kostanay Regional University, 47 Baytursynov Str., 110000, Kostanay, Kazakhstan text PhytoKeys 2023 2023-07-27 229 185 213 http://dx.doi.org/10.3897/phytokeys.229.105457 journal article http://dx.doi.org/10.3897/phytokeys.229.105457 1314-2003-229-185 7F9045A5C7F05651BA3D05E555438700 Malaxis monophyllos (L.) Sw. Distribution in adjacent reg. Russia (European Russia, Ural, Siberia). Specimens examined and literature records. Tobol-Ishim: Kostanay Region : Mendykara District: Borovskaya water protection forest dacha, 17 Jul 1925 , Rusanov 1553 (LE!); near Borovskoye ( Pugachev 1994 ); near Kamenskural'skoe ( Pugachev and Masyukova 1969 ); Auliekol District: near Kalininskoye ( Pugachev 1994 ). Eastern Upland: Pavlodar Region : Bayanaul District: Bayanaul Mountains, 30 Jun 1913 , Kucherovskaya s.n.. (LE!); same loc., 10 km west of Bayan-Aul, 19 Jul 1959 , Denisova 436 (LE!); same loc., 19 Jul 1959 , Denisova 427 (MW 0816997!). Karkaraly: Karaganda Region : Karkaraly District: Zhisil'tau Mountains, near Egindibulak, 19 Jul 1992 , Kupriyanov s.n.. (KG!). Habitat and ecology. Grassy birch forests, near lakes, along forest streams. Phenology. Flowering in Jun-Jul; fruiting in Aug-Sept. Conservation status. Not protected. We recommend to include this species in the next edition of the Red Book of Kazakhstan. Notes. Forms both with one and with two well-developed leaves occur in Kazakhstan, the latter being recognised as a variety of M. monophyllos var. diphyllos (Cham.) Luer (e.g. by Pavlov 1928 ). Bayan-Aul and Karkaraly Mts represent the southernmost locality of the species in Central Asia.