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This publication is to announce the database of the Moss Flora of Russia at http://arctoa.ru/Flora/ basa.php. It also explains the strategy and approaches so as to be maximally useful for the publication of the Moss Flora of Russia, a six-volume print edition that was started in 2017. The database currently contains over 128 000 records; it is shown to be reasonably complete for illustrating the species distribution within the expanded territory of the country. A number of scripts allow instant comparison of various territories, highlighting hotspots and underexplored areas. Problems of data control and presentation are discussed. Резюме В данной статье анонсируется база данных по флоре мхов России, размещенная по адресу http://arctoa.ru/Flora/basa.php. В ней также представлены стратегия и подходы к максимально полному ее использованию для подготовки публикации шеститомного печатного издания "Флора мхов России", которое стартовало в 2017 г. В настоящее время в базе представлено более 128 000 образцов; показано, что уже сейчас распространение видов на территории страны отражается адекватно. Наличие нескольких скриптов позволяет быстро проводить сравнение флор разных территорий, которое выявляет наиболее флористически богатые регионы и "белые пятна" в исследовании флор. Обсуждаются проблемы контроля за внесением информации и ее представ-лением.

In the Russian Arctic 530 moss species of 154 genera and 43 families are now known. Their distribution is listed according to 15 subdivisions of the Russian Arctic, with the indication of species frequency for the whole territory. The complete list of synonyms and bibliography are also provided. ÐåçþìåÍà òåððèòîðèè Ðîññèéñêîé Àðêòèêè â íàñòîÿùåå âðåìÿ èçâåñòíî 536 âèäîâ ìõîâ, îòíîñÿùèõñÿ ê 154 ðîäàì è 43 ñåìåéñòâàì. Ïðèâåäåí èõ ñïèñîê ñ óêàçàíèåì èõ ðàñïðîñòðàíåíèÿ â 15 ðàéîíàõ Ðîññèéñêîé Àðêòèêè è ÷àñòîòû âñòðå÷àåìîñòè (îöåíèâàåìîé â öåëîì äëÿ âñåé òåððèòîðèè). Êðîìå òîãî äàí ïîëíûé ñïèñîê ñèíîíèìîâ è àííîòàöèè äëÿ âèäîâ, óêàçàííûõ â Àðêòèêå ëèøü îäèí ðàç, à òàêaeå íåêîòîðûå òàêñîíîìè÷åñêèå çàìå÷àíèÿ. Áèáëèîãðàôèÿ âêëþ÷àåò âñå ïóáëèêàöèè, â êîòîðûõ ñîäåðaeèòñÿ ñóùåñòâåííàÿ èíôîðìàöèÿ ïî ìõàì Ðîññèéñêîé Àðêòèêè.

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Results of study of moss flora of Kamchatka Peninsula (Russian Far East) is presented. The list includes 439 species and 12 varieties of mosses. Annotations include localities and reference for each species. The history of bryological exploration and bibliography on bryophyte studies of Kamchatka Peninsula is given. ÐåçþìåÏîäâåäåíû èòîãè èçó÷åíèÿ ôëîðû ìõîâ ïîëóîñòðîâà Êàì÷àòêà (Äàëüíèé Âîñòîê).  ñòàòüå ïðåäñòàâëåíû èñòîðèÿ èçó÷åíèÿ áðèîôëîðû ïîëóîñòðîâà è áèáëèîãðàôèÿ ïî èçó÷åíèþ åãî áðèîôëîðû. Àííîòèðîâàííûé ñïèñîê âêëþ÷àåò 439 âèäîâ è 12 ðàçíîâèäíîñòåé ìõîâ. Äëÿ êàaeäîãî âèäà ïåðå÷èñëåíû âñå ìåñòîíàõîaeäåíèÿ íà îñíîâå ãåðáàðíûõ è ëèòåðàòóðíûõ èñòî÷íèêîâ.1 -Ðîññèÿ 197376, Ñàíêò-Ïåòåðáóðã, óë. Ïðîô. Ïîïîâà, 2, Áîòàíè÷åñêèé èíñòèòóò èì. Â. Ë. Êîìàðîâà ÐÀÍ -V. L. Komarov Botanical Institute Rus. Acad. Sci., Prof. Popov Str., 2, St. Petersburg, 197376 Russia HISTORY OF BRYOLOGICAL EXPLORATION The first collections of bryophytes from Kamchatka were made by the participants of the Krusenstern' round-the-world travel in 1803-1806. Bryophytes in this expedition were collected by W.G.Tilesius, while most of vascular plants -by G.H. Langsdorff; they collected in Kamchatka in the neighborhood of Avatcha Bay. Collections of Thilesius was determined and published by Wahlenberg (1811). This first publication on bryophytes of Kamchatka includes 31 mosses and 9 liverworts species. Based on the Kamchatka collection, Wahlenberg described two new speciesEncalypta corniculata (= Timiella corniculata) and Splachnum luteum var. melanocaulon (= Splachnum melanocaulon).The next study in Kamchatka was conducted by A.L.C. Chamisso, who participated (together with J.F.G. von Eschscholtz and L. Choris) in the expedition of Kotzebue on «Rurik» in 1815-1818. This expedition explored surroundings of Petropavlovsk (Avacha Bay), where Chamisso gathered a small collection of mosses. This collection was studied by S.E. Bridel-Brideri, who included these data in his "Bryologia universa" (BridelBrideri, 1826(BridelBrideri, -1827. In total, this paper includes 49 moss species. Also Bridel-Brideri reported 12 species for Kamchatka based on collections of Redowsky. However, as noted by H. Moeller (1927) and V.L. Komarov (1927), Redowsky died and did not reach Kamchatka, therefore his collections were most probably gathered near Ochotsk. Thus, the collections of Redowsky are not cited in the following checklist, and these data repeated by J. A. Weinmann (1845) and A.S. Lazarenko (1940, 1941b, 1941-1945 are also omitted. Later Kamchatka was visited by the steamship «Blos-som» during its around-the-world trip in 1825-1828, with the captain F.W. Beechey. In 1826 «Blossom» had a stop in Avatcha Bay, where the naval officer A. Collie and naturalist T. Lay gathered a small collection of plants, later studied and published by W.J. Hooker and G.A.W. Arnott (1841). Their list included 18 mosses and 1 liverwort. Later, publications of Erman (1835) and Wilson (1858) provided further data on mosses of Kamchatka, the latter publication included 10 moss ...