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

Viola decumbens L. f.

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• Viola decumbens L. f. var. decumbens  > Viola decumbens L. f.

• Viola decumbens var. scrotiformis (DC. ex Ging.) Jessop 

Distributional Range: Native Africa SOUTHERN AFRICA: South Africa [Cape Province]

Habitat: Viola decumbens occurs only in the in  the extreme south of the Western Cape (from Worcester to the Cape Peninsula and eastwards as far as Riviersonderend ), and can be found in for instance in the Kogelberg en Hottentots Holland area. It prefers moist sandy soils on low altitude slopes.  Viola decumbens  is a montane species in fynbos, flowering July-December. 

References:

1. Dyer, R. A. et al., eds. 1963-. Flora of southern Africa.