Funding for this research was provided by:
Russian Science Foundation (14-50-00150, 17-14-01315)
Article History
Received: 10 January 2018
Accepted: 30 July 2018
First Online: 9 August 2018
Ethics approval
: E. aphyllum is a protected species in Russia; it was collected under permission from Kandalaksha State Reserve (agreement #2011_31). E. roseum was collected during the expedition approved by the Joint Russian–Vietnamese Tropical Scientific and Technological Center. H. monotropa is not rare and/or endangered plant in the area of its collection thus no permission is required.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.