Flatberg K.I.1, Afonina O.M.2, Mamontov Yu.S.3, Fedosov V.E.4, Ignatova E.A.4 2016. A catalogue of Sematophyllaceae types deposited at bryological herbarium of the Komarov Botanical Institute in St. Petersburg, Russia // Arctoa. Vol. 25(1): 96–101 [in English].

1 University Museum, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway; e-mail: kjell.flatberg@vm.ntnu.no

2 V.L. Komarov Botanical Institute Rus. Acad. Sci., Prof. Popov Str., 2, St. Petersburg, 197376 Russia; e-mail: stereodon@yandex.ru and yur-mamontov@yandex.ru

3 Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276 Russia; e-mail: yur-mamontov@yandex.ru

4 Moscow State University, Faculty of biology, Vorob’ovy gory 1-12, Moscow 119991 Russia; e-mails: fedosov_v@mail.ru , arctoa@list.ru

KEYWORDS: Sphagnum, rare species, subgenus Acutifolia, subgenus Squarrosa, Asian Russia.

ABSTRACT. Two moss species, Sphagnum mirum and S. olafii are reported from Russia for the first time. Sphagnum mirum was found in Ary-Mas Station, Eastern Taimyr, and in Zabaikalsky Territory; S. olafii was revealed in collections from Chukotka Peninsula and from Zabaikalsky Territory. Both species were recently described by the first author from the Arctic: Alaska (S. mirum) and Svalbard (S. olafii), and their ranges remain insufficiently known. Both findings in Russia are new for Asia and continental Eurasia. Localities in Zabaikalsky Territory are the southernmost ones for both species, the only known outside Arctic. Descriptions and illustrations of these species, based on Asian collections, are provided, their ecology and distinctive morphological characters are overviewed.

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doi 10.15298/arctoa.25.06