• Korean Journal of Plant Taxonomy
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• v.38 no.3
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• pp.333-343
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• 2008

Two newly naturalized species were recorded from Gangwon-do and Jeju-do. Among them, numerous populations of Hieracium caespitosum (Asteraceae) were found in 2006 along the road near the military area at, Mt. Dosolsan, Yanggu-gun, Gangwon-do. The other species, Trifolium incarnatum (Fabaceae) was widespread and found at various locations including Jeongsil and Woo-do in Jeju-si, Jeju-do and Gasioreum, Daejeong-eup, Seoguipo-si, Jeju-do and Daehandawon Plantation in Hoecheon-myon, Boseong-gun, Jeonranam-do in 2008. Hieracium caespitosum was found to be distinguished from the allied species, H. umbellatum in the same genus, by a lot of capitula and a well developed cluster of basal leaves during the flowering time. Trifolium incarnatum can be distinguished from other species in the same genus by an erect form, long inflorescence and deep-red flowers.