References
- Becker, W. 1910. Viola Europaeae: Systematische Bearbeitung der Violen Europas und Seiner Benachbarten Gebiete. C. Heinrich, Dresden, 153 pp.
- Clausen, J. 1967. Cytotaxonomy and distributional ecology of western North American violets. Madrono 17: 173-197.
- Gil-Ad, N. L. 1997. Systematics of Viola subsection Boreali-Americanae. Boissiera 53: 1-130.
- Kim, K.-A., H. Lee, K.-S. Cheon and K.-O. Yoo. 2019. A new species of Viola (Violaceae): Viola ramiflora K. O. Yoo. Korean Journal of Plant Taxonomy 49: 140-144. https://doi.org/10.11110/kjpt.2019.49.2.140
- Lee, T. B. 2003. Coloured Flora of Korea. Hyangmunsa, Seoul, 2096 pp. (in Korean)
- Lee, W. T. 1996. Standard Illustrations of Korean Plants. Academy Publ. Co., Seoul, 624 pp. (in Korean)
- Lee, W. T. and K.-O. Yoo. 2007. Violaceae. In The Genera of Vascular Plants of Korea. Park, C. W (ed.), Academy Publ. Co., Seoul. Pp. 393-402.
- Lee, Y. N. 2006. New Flora of Korea. Kyohaksa, Seoul, Vol. 1, 975 pp, Vol. 1, 885 pp. (in Korean)
- Linnaeus, C. 1753. Species Plantarum. 1st ed. Laurentius Salvius, Stocholm. Pp. 933. (in Latin)
- Maekawa, F. 1954. Violaceae. In Enumeratio Spermatophytarum Japonicum III. Hara, H. (ed.), Iwanami, Tokyo. Pp. 194-227.
- Marcussen, T., L. Heier, A. K. Brysting, B. Oxelman and K. S. Jakobsen. 2015. From gene trees to a dated allopolyploid network: insights from the Angiosperm genus Viola (Violaceae). Systematic Biology 64: 84-101. https://doi.org/10.1093/sysbio/syu071
- Marcussen, T., K. S. Jakobsen, J. Danihelka, H. E. Ballard, K. Blaxland, A. K. Brysting and B. Oxelman. 2012. Inferring species networks from gene tree in high-polyploid North American and Hawaiian violets (Viola, Violaceae). Systematic Biology 61: 107-126. https://doi.org/10.1093/sysbio/syr096
- Matsumura, J. 1886. Catalogue of Plants in the Herbarium of the College of Science, Imperial University. Tokyo, 287 pp.
- McKinney, L. E. 1992. A Taxonomic Revision of the Acaulescent Blue Violets (Viola) of North America. Botanical Research Institute of Texas, Fort Worth, TX, 59 pp.
- Melchior, H. 1925. Violaceae. In Die Naturlichen Pflanzenfamilien 21. Engler, A. and K. Prantl (eds.), Wilhelm Engelmann, Leipzig. Pp. 329-377.
- Nakai, T. 1916. Viola coreanae. Botanical Magazine, Tokyo 30: 276-289.
- Palibin, J. 1899. Conspectus Florae Koreae I. Acta Horti Petropolitani 17: 30-36.
- Park, S. C. 2017. Violets of Korea. ATLAS Research & Consulting, Seoul. Pp. 183-185. (in Korean)
- Park, S. H. 2009. New Illustrations and Photographs of Naturalized Plants of Korea. Ilchokak, Seoul. Pp. 220-224. (in Korean)
- Vitek, E., J. Danihelka and W. Adler. 2012. Viola x palmata L. (Violaceae) new for Austria and Europe. Annalen des Naturhistorischen Museums in Wien, Serie B 113: 264-265.
- Yoshida, M., S.-I. Takeda and J. Yokoyama. 2016. A new and noteworthy hybrid of Viola (Violaceae) from Iwate, Northern Japan: Viola rostrata var. japonica x V. violacea var. makinoi. Acta Phytotaxonomica et Geobotanica 67: 115-122.
- Yoo, K.-O. and S.-K. Jang. 2010. Infrageneric relationships of Korean Viola based on eight chloroplast markers. Journal of Systematics and Evolution 48: 474-481. https://doi.org/10.1111/j.1759-6831.2010.00102.x