Validation of two varieties of Oxytropis tragacanthoides (Fabaceae) from Southern Siberia

Abstract

K e y w o r d s : Oxytropis tragacanthoides, Fabaceae, new varieties, nomenclature, taxonomy, Russia, Mongolia, Southern Siberia Р Е З Ю М Е Кривенко Д.А., Татанов И.В., Беляева И.В. Валидизация двух разновидностей Oxytropis tragacanthoides (Fabaceae) из Южной Сибири. Действительно обнародованы две разновидности Oxytropis tragacanthoides Fisch. ex DC.: var. parviflora Polozhij ex Krivenko, var. nova и var. glabra Peschkova ex Krivenko, var. nova., в соответствии с Международным кодексом номенклатуры водорослей, грибов и растений (Шэньчжэньский кодекс). Для каждой новой разновидности приводятся описание, иллюстрация голотипа, распространение и отличие от Oxytropis tragacanthoides var. tragacanthoides. Ключевые слова: Oxytropis tragacanthoides, Fabaceae, новые разновидности, номен­ кла тура, таксономия, Россия, Монголия, Южная Сибирь Denis A. Krivenko1,2,3* e-mail: krivenko.irk@gmail.com Ivan V. Tatanov4 e-mail: tatanov@binran.ru Irina V. Belyaeva5,6 e-mail: i.belyaeva@kew.org 1 Siberian Institute of Plant Physiology & Biochemistry SB RAS, Irkutsk, Russia 2 Western Baikal Protected Areas, Irkutsk, Russia 3 National Research Tomsk State University, Tomsk, Russia 4 Komarov Botanical Institute RAS, St. Petersburg, Russia 5 Royal Botanic Gardens Kew, Richmond, United Kingdom 6 Botanic Garden UB RAS, Yekaterinburg, Russia * corresponding author Manuscript received: 25.11.2019 Review completed: 19.04.2020 Accepted for publication: 23.04.2020 Published online: 25.04.2020 Denis A. Krivenko1,2,3*, Ivan V. Tatanov4 & Irina V. Belyaeva5,6 Validation of two varieties of Oxytropis tragacanthoides (Fabaceae) from Southern Siberia The genus Oxytropis DC. was established in 1802 (Fabaceae, seu Leguminosae; Faboideae ≡ Papilionoideae; Galegeae; Astragalinae) as one of the largest genera in Faba ceae. The genus includes about 400 species (Malyshev 2008), more than 370 of which are distributed mainly in Nor thern Eurasia (Yakovlev et al. 1996). The centre of diver sity of Oxytropis is Central Asia where 175 species occur which is more than a half of all known species of the genus. This genus is extremely diverse and rich in endemics: 78 spe cies of the total number are endemic to Central Asia (Vassilczenko 1965, Grubov 2003). In Southern Siberia, Oxytropis tragacanthoides Fisch. ex DC. is a representative of the Central Asian section Hystrix Bunge. Here this species has the status of a tertiary relict, the main part of whose range is in Central Asia (Peshkova 2001). Oxytropis tragacanthoides is a very polymorphic species. Three varieties of the species, O. tragacanthoides var. parviflora Polozhij (1965), O. tragacanthoides var. glabra Peschkova (1972), and O. tragacanthoides var. curaica Revuschkin (1990), have been described from the territory of Southern Siberia. However, the first two names were never validly published according to the International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code) (ICN) (Turland et al. 2018). Thus, we validate the names O. tragacanthoides var. parviflora and O. tragacanthoides var. glabra here, providing descriptions, diagnoses, illustrations of holotypes and distributions.