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

Viola dacica Borbás

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Syn .: Viola declinata auct. non Waldst. et Kit. ; Viola declinata subsp. hulgarica Form.; Viola prolixa (Adamovič) Pančič; Viola declinata var. prolixa (Velen.) Adamovič; Viola rothomagensis sensu Borbäs non Thuill.

Description: A perennial hairy herb  15–35 cm high. Leaves only flat, mid leaves long, oblique-ovate lanceolate, max. Mid-length palm divided to broad segments, leaf stalks 2-4 cm long, ovate or elliptic blades 2-4 cm long, crenate, bare or ciliate . Flowers long stalked, large, crown 2-3 cm, violet or yellowish, promontory very short, barely reaching the length of calyx leaflets.  

Distributional Range: Native Europe MIDDLE EUROPE: Czechoslovakia (possibly), Poland (s.e.) EASTERN EUROPE: Moldova, Ukraine SOUTHEASTERN EUROPE: Albania, Bulgaria, Former Yugoslavia, Romania

Habitat: Viola dacica is found in grassland, in foothill to mountain range (approx. 700-1200 m), in Bulgaria it reaches up to 2300 m above sea level.  It blooms from June to August.  

References:

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

2. Tutin, T. G. et al., eds. 1964-1980. Flora europaea