BOTANICAL PRINT Witte Vintage Art Plate Viola Tricolor or Wild - Etsy Canada
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pansy | Description, Flower, Species, & Facts | Britannica
WILD PANSY (<i>Viola tricolor</i> L) en Soria Natural
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PDF) Viola tricolor (Violaceae) is a karyologically unstable species | Elżbieta Kuta - Academia.edu
Karyologic and Heterosis Studies of the Artificial Inter- and Intraspecific Hybrids of Viola ×wittrockiana and Viola cornuta in: HortScience Volume 53 Issue 9 (2018)