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Chromosome numbers for 17 species of 15 genera from 10 families were studied on the material of the North of the Russian Far East. Chromosome numbers for 3 species was counted for the first time (endemic species of North coast of Sea of Okhotsk: Minuartia tricostata, Saxifraga derbekii and Pedicularis ochotensis). Chromosome numbers in 4 species were first counted on the material from Magadan Region. Brief information on the distribution of the studied species is provided. K e y w o r d s : chromosome numbers, vascular plants, Far East, Russia Р Е З Ю М Е Андриянова Е.А. Числа хромосом некоторых видов сосудистых растений Севера российского Дальнего Востока: Магаданская область и Чу котский автономный округ. Приводятся числа хромосом для 17 видов из 15 родов и 10 семейств, полученные на материале с севера Дальнего Вос­ то ка. Впервые определены числа хромосом для 3 видов (эндемичных для северного побережья Охотского моря Minuartia tricostata, Saxifraga derbekii и Pe di cularis ochotensis). Определение чисел хромосом 4 видов впервые выпол­ не но на территории Магаданской области. Даны краткие сведения по распространению изученных видов. К л ю ч е в ы е с л о в а : числа хромосом, сосудистые растения, Дальний Восток, Россия Elena A. Andriyanova* e-mail: l_chipmunk@mail.ru Institute of Biological Problems of the North FEB RAS, Magadan, Russia *corresponding author Manuscript received: 24.03.2019 Review completed: 25.08.2019 Accepted for publication: 01.11.2019 Published online: 06.11.2019 Elena A. Andriyanova Chromosome numbers of some vascular plants from North of Russian Far East: Magadan Region, Chukotka Autonomous Area This paper continues our contributions to chromosome counts of the vascular plants of the North of the Russian Far East. Root tips of plants were collected from seed lings in la bo ratory for the most species. Root tips of 5 species (Callitriche palustris, Dicentra peregrina, Claytoniella vassilievii, Thalictrum alpinum, Ranunculus repens) were collected from living plants in nature. Chromosome counts were performed by direct count in root meristem on squashed preparations of root tips. The root tips were pretreated with colchicine (0.02 %), fixed with mixture of alcohol and acetic acid (3:1), and stained with iron acetic hematoxylin. The locations of data sampling points are showed on the map (Fig. 1). Chromosome counts in the literature were checked using the international databases: “Index to plant chromosome num bers” (Goldblatt & Jonson 1979) and “The Chromosome Counts Database” (Rice et al. 2015). First chromosome data for species are indicated with an asterisk (*). First chromosome counts from the Magadan Region are indicated by (!). All herbarium specimens are deposited in Herbarium of the Institute of Biological Problems of the North FEB RAS (MAG). ASTERACEAE (!) Arctanthemum arcticum (L.) Tzvel., 2n=18 Magadan Region, Olskii District, Ola lagoon, Sikulun Is land, on the pebble, 59°33'39.88"N 151°20'20.68"E, 04 Sept 2013, coll. E. Andriyanova А13151а: 1. Distribution: Figure 1 Study area. Dots with numbers from 1 to 6 are the sampling plot locations (according to numbering in the text)