Cypripedium calceolus L.

Distribution in adjacent reg.

Russia (European Russia, Ural, Siberia), Kazakhstan (Altai).

Specimens examined and literature records.

Kokchetav: Akmola Region: Burabay District: “Burabay” State National Nature Park: near Shchuchinsk, Barmashinskoe forestry, 12 Jul 2019, Kubentaev s.n.. (NUR!); same loc., 15 Jun 1965, Oleneeva and Antoshenko s.n.. (SVER 695751!); same loc., 18 Jun 2012, Artemova s.n.. (KUZ 02637!); same loc., 8 Jun 2011, Kupriyanov and Hrustaleva s.n.. (KUZ 01096!); same loc., 2.5 km northeast of Shchuchinsk, 12 Jun 2011, Hrustaleva s.n.. (KUZ 00884!); Zolotoborskoe forestry, 23 Jun 2016, Hrustaleva and Artemova s.n.. (KUZ 02798!); same loc., 3 km south of the Barmashino, 13 Jun 1972, Gorchakovskiy s.n.. (SVER 695752!); near Barmashino Lake, 26 Jun 1890, Gordyagin 503 (LE!); the northern shore of Kotyrkol Lake, 19 Jun 1902, Ignatov and Petrovskiy 209 (LE!); same loc., 31 May 1902, Ignatov and Petrovsky 209 (LE!); located 3-3.5 km east of Katarkol (Kupriyanov 2020); located 2.5 km northeast of Burabay, on the shore of Borovoe Lake (Kupriyanov 2020). Tobol-Ishim: North Kazakhstan Region: Kyzylzhar District: on the right shore of Ishim River, 75 km north of Petropavlovsk, 5 km north of Krasnoyarka, 16 Jun 1968, Kolodchenko s.n.. ( АА !, LE!); on the right shore of Ishim River, near Krasnoyarka, Jun 1968, Syzganov et al. s.n.. (NKU!); same loc., Jun 1968, Terekhina et al. s.n.. (NKU!); same loc., Jun 1968, Freze s.n.. (NKU!). Irtysh: Pavlodar Region: Zhelezinskiy District: on the right shore of Irtysh River ( Kusnetsov and Pavlov 1958; Kazakh SSR Red Data Book 1981). Semipalatinsk Pinery: East Kazakhstan Region: Beskaragay District: on the right shore of Irtysh River (Kusnetsov and Pavlov 1958; Kazakh SSR Red Data Book 1981; Red Book of Kazakhstan 2014) .

Habitat and ecology.

Birch and birch-pine forests, forest stream valleys, forest swamps and forest lake shores.

Phenology.

Flowering in Jun; fruiting in Jul-Aug.

Conservation status.

It is included in the Red Book of Kazakhstan (category III). It is a rare and endangered species protected in the “Burabay” State National Nature Park, “Sogrov” State Nature Reserve and "Floodplain of the Irtysh River" State Nature Reserve.

Notes.

Some populations of Cypripedium calceolus are located near Shchuchinsk and the village of Burabay, in areas with high recreational activity. These populations require special attention and protection due to the low number of plants in the populations, which can be attributed to the significant anthropogenic impact in these areas (Sultangazina et al. 2014; Kupriyanov 2020).