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

Viola dukadjinica W. Becker & Kosa

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Synon.: Viola albanica HALACSY var. lutea W. BECKER  

Description: Perennial, loose-grained herb 6–15 cm high. Stems thin, with leaves crowded on top. Leaves 1.5–3 cm long and 2-4 mm wide, inverted-lanceolate to linear-inverted lanceolate, entire, gradually tapering towards the base, with no apparent stem. Flower stems 4-9 cm long. Calyx leaves lanceolate-lanceolate, pointed, 8–12 mm long. Crown usually yellow, rarely pink, lower crown leaf 18–25 (–30) mm long, including (6–) 8–12 mm long, slender spurs. The fruit is a capsule. 

Interchanges: It grows in common locations with Viola albanica , from which it differs mainly in the shape of the leaves, the shorter flower stalk and usually the yellow flowers, they commonly cross. A related species is Viola brachyphylla W. Becker from the southern part of the former Yugoslavia, which has only 10 mm long leaves. 

Distributional Range: native Europe SOUTHEASTERN EUROPE: Albania;  Macedonia;  Greece [North Pindos, Vasilitsa, Smolikas]

Habitat: A species specialized in serpentinite substrates, growing on stony slopes, debris and snowy slopes at an altitude of 1900–2600 m. It blooms in May to August.  

References:

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