Trollius austrosibiricus (Ranunculaceae), a new species from South Siberia

Abstract

Trolliusaustrosibiricus Erst & Luferov, sp. nov., a new species from Russian South Siberia is described and illustrated. This new species is endemic to Western and Central Siberia. Morphologically, it is close to the East Asian species T.chinensis and T.macropetalus. However, it differs from the aforementioned species due to the morphology of the rhizomes, aerial shoots, sepals and petals. This species is also distinguished from T.asiaticus, which is widespread in Russia (Western and Eastern Siberia), Mongolia, China, north-eastern Kazakhstan and in the northeast of the European part of Russia, in having a smaller number of sepals, longer persistent styles and petals longer than sepals. In addition, an identification key for all Russian species is given and all species have been discussed.

Cytogenetic characteristics of some Trollius L. species (Ranunculaceae) from Asian Russia

“…The degree of variability RL in T. austrosibiricus and T. kytmanovii was slightly lower (Table 2). It should be mentioned that T. chinensis, being morphologically similar to T. austrosibiricus (Erst et al, 2019), appeared to differ from T. austrosibiricus in the karyotype formula, which was 2n = 2x = 16 = 8sm + 8st (Doroszewska, 1967).…”

“…& Thomson and Megaleranthis Ohwi (Wang et al, 2010). In Russia, about 19-20 Trollius species are recognized (Luferov et al, 2018;Erst et al, 2019). These plants are used for decorative and medical purposes (Witkowska-Banaszczak, 2015;Jiang et al, 2020).…”

“…Mey, T. asiaticus L., T. ledebourii Rchb T. lilacinus Bunge (Hegemone lilacina Bunge), and nuclear DNA content of nine Trollius species . The present work is a follow-up to this study, and it focuses on karyotypes of three species of Asian Russia: Trollius ausrtosibiricus Erst et Luferov (Erst et al, 2019), T. kytmanovii Reverd., and T. riederianus Fisch. & C.A.Mey.…”

“…Trollius austrosibiricus is endemic to mountainous areas of the southern part of Western and Central Siberia -the Tuva Republic, Kemerovo Oblast, Krasnoyarsk Krai, Khakassia Republic (Erst et al, 2019), and the Altai Republic (new data). Trollius austrosibiricus is morphologically close to T. chinensis s. l. It is well distinguished by simple rhizomes (rather than by the multiheaded basal part of the plant, as in T. chinensis), shorter aerial shoots, sepals 8-14, petals 20-28 mm long, 1.2-1.5 times longer than, smaller flowers and shorter persistent styles.…”

Findings to the flora of Russia and adjacent countries: New national and regional vascular plant records, 3

“…This species grows in sub alpine and forest zones, in moist valleys at 350-2600 m a.s.l. It occurs in forest glades and fringes, in mixed-grass and mixed-grass-cereal dry and swampy meadows, along the banks of rivers, streams and small ponds with fresh water (Erst et al 2019). Taxonomic notes.…”