Abstract
The paper offers a new revision of the species composition of the Cruciferae family in Yakutia, which is supplemented by information on the geographical distribution and taxonomic composition. In the present work, the crucifers of Yakutia are represented by 39 genera and 102 species. Among them, there are two endemic species (Boechera falcata (Turcz.) Al-Shehbaz and Smelowskia jacutica (Botsch. et Karav.) Al-Shehbaz et Warwick), and one subendemic (Isatis jacutensis (N. Busch) N. Busch). Traditionally, the genus Draba is the richest in the number of species in the territories reaching into the Arctic. At present, taking the latest processing of the genus by V. V. Petrovsky (Petrovsky, 2018) into account, it numbers 32 species, which amounts to about 1/3 of the total species richness of this family in Yakutia. The paper summarizes the nomenclature changes that have affected a number of representatives of this family in recent years, and proposes new combinations in the genus Boechera (B. pendula (L.) V. I. Dorof. Comb. Nov.) and Thellungiella (T. bursifolia (DC.) V. I. Dorof. Comb. Nov.). An analysis of the diversity of crucifers made it possible to assert that the flora of Yakutia is obviously insufficiently studied in its northwest and northeast reaches, and to suggest that the floristic zoning of Yakutia should be supplemented by outlining three supra-regions, namely the Verkhoyansk (eastern), Vilui (western) and Arctic (northern) supra-regions.
Highlights
Для территории Республики, имеющей выход в арктические широты, наиболее богатым по чис‐ лу видов является род Draba
The paper offers a new revision of the species composition of the Cruciferae family
which is supplemented by information on the geographical distribution and taxonomic com‐ position
Summary
СЕМЕЙСТВО CRUCIFERAE JUSS. (BRASSICACEAE BURNETT) – КРЕСТОЦВЕТНЫЕ РЕСПУБЛИКИ САХА (ЯКУТИЯ). (BRASSICACEAE BURNETT) – КРЕСТОЦВЕТНЫЕ РЕСПУБЛИКИ САХА (ЯКУТИЯ). Cruciferae Якутии, которая дополняется информацией по его географическому распространению и таксономическому составу. В насто‐ ящей работе крестоцветные Якутии представлены 39 родами и 102 видами. В их числе два эндемика (Boechera falcata (Turcz.) Al-Shehbaz, Smelowskia jacutica Традиционно для террито‐ рий, имеющих выход в арктические широты, наиболее богатым по числу видов является род Draba. В. Петровского (Petrovsky, 2018), род насчитывает 32 вида, что составляет около трети всего видового богатства этого семей‐ ства в Якутии. В статье подводится итог номенклатурных изменений, затронувших в последние годы некоторое количество представителей этого семейства и предложены новые комбинации в роде Boechera (B. pendula (L.) V. Nov.) и Thellungiella (T. bursifolia (DC.) V. Ключевые слова: крестоцветные, Cruciferae, Brassicaceae, Boechera pendula, Thellungiella bursifolia, Draba, флора, флористическое районирование, Республика Саха (Якутия)
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