Genus Thymus L. (Lamiaceae) in the herbarium of the North-Eastern Federal University

In 2020, staff and students from the Botany Laboratory at the Institute of Natural Sciences began inventorying the vascular plant collection at the A.A. Makarov Herbarium of North-Eastern Federal University (NEFU) and creating an electronic catalog. This article presents information on the collection of the genus Thymus L. in the NEFU Herbarium. The genus Thymus is one of the largest and taxonomically complex in the family Lamiaceae Martinov. The aim of this study is to inventory and critically revise the genus Thymus L. in the NEFU Herbarium collection. Herbarium specimens served as the basis for this work. Based on the results of the inventory of the genus Thymus, an electronic catalog was compiled containing all herbarium label data and georeferencing. In total, the genus Thymus is represented in the Herbarium's main collection by 33 specimens, collected from the 1950-1980s from various regions of the Sakha Republic (Yakutia). In subsequent years, thyme collections were conducted by staff and students of the Biology Department of the NEFU Institute of Natural Sciences during educational field trips (in the Khangalassky and Namsky districts of Central Yakutia), which are used in educational work. The collections included specimens whose taxa were listed according to the nomenclatural rules of the 1940-1950s. Consequently, a critical revision of all specimens was conducted. 10 species were identified: Thymus bituminosus, T. brevipetiolatus, T. diversifolius, T. extremus, T. iljinii, T. jurtzevii, T. karavaevii, T. mongolicus s. str., T. sibiricus, and T. tonsilis. As a result of the collection revision, 2 type specimens (isotype) were discovered of Thymus jurtzevii Vasjukov. The staff and students of the botany laboratory at the Institute of Natural Sciences continue to inventory and compile an electronic catalog of the vascular plant of the A.A. Makarov Herbarium collection.

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