kingdom Plantae - plants »  divisio Magnoliophyta - flowering plants »  class Rosopsida - eudicots » order Malpighiales »  family Violaceae »  tribus Violeae > genus Viola > Viola sect. Melanium  Ging. 

Viola lavrenkoana Klokov

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Synon: Viola cretacea Klokov 

Common name: Фиалка Лавренко , Lavrenko violet

Description: first described by the Ukrainian botanist Mikhail Vasilievich Klokov in 1927 

Distributional Range: Native Europe EASTERN EUROPE: Russian Federation-European part, [European part, Khopery Reserve] Ukraine

Habitat: 

Note: listed in the Red Books of Donetsk, Lugansk, Odessa and Kherson regions of Ukraine 

References:

1. Czerepanov, S. K. 1995. Vascular plants of Russia and adjacent states (the former USSR) Cambridge University Press.

2. Komarov, V. L. et al., eds. 1934-1964. Flora SSSR.

3. Tutin, T. G. et al., eds. 1964-1980. Flora europaea. Note: questionable species