The evergreen Korean black pine (Pinus thunbergii L., Pinaceae) is distributed in hardiness zones 5–10 (Magarey et al., 2008). Black pine is a garden and bonsai tree in Korea and Japan, as it can be trained and has many latent buds (Lee, 1999). Annual P. thunbergii bonsai sales has been ≈4 million dollars in South Korea (Korea Forest Service, 2013). There are currently 16 cultivars: Compacta, Globosa, Lseli, Majestic Beauty, Mini Mounds, Mt. Hood Prostrate, Oculus-draconis, Pygmaea, Thunderhead, Banshosho, Tailored, Green Elf, Shirome Janome, Ansu Hwanggumsong, Ansu Hobansong, and Ansu Migumsong, which originated from Japanese black pine (Richard, 2007). The new cultivar, Seoju Hwangkeum Sol with yellow leaves and shoots was selected from Seoju plantation at Seocheon-gun Seongjuri, Chungnam Province, South Korea, in 2001. Another new cultivar Hwangsim Sol was selected from a 25-year-old population of P. thunbergii at Haman-gun Mukiri, Gyeongnam Province, South Korea, in 2002. This report describes these two new cultivars.
Korea Forest Service 2013 Production of Forest Products (2012). Korea Forest Service, Daejeon, Korea
Lee, T.B. 1999 Illustrated Flora of Korea. Hyangmunsa, Seoul, Korea
Richard, L.B. 2007 Conifers for gardens: An illustrated encyclopedia, p. 317-319. Timber Press, Portland, OR
Royal Horticultural Society (RHS) 2007 RHS colour chart. Royal Horticultural Society, London, UK
Toogood, A.R. 1999 Plant propagation. American Horticultural Society, New York, NY
UPOV 2013. Glossary of terms used in UPOV documents. International Union for the Protection of New Varieties of Plants, Geneva, Switzerland. 25 Sept. 2015. <http://www.upov.int/edocs/tgpdocs/en/tgp_14.pdf>