충주시 남한강의 관속식물상 분포

Abstract

Department of Horticultural Science, Chungbuk National University, Cheongju 361-763, KoreaAbstract - This study was carried out to survey the vascular plants of Namhan River located in Chungju-si, and the period of survey was from June, 2010 to June, 2011. The results are as follows. The vascular plants distributed in Neungam, Mokgye and Jangcheon around Namhan river were summarized as 225 taxa including 52 families, 164 genera, 200 species, 23 varieties and 2 forms. The rare plant designated by Korea Forest Service was Aristolochia contorta Bunge, and the endemic plant was identified as Salix koriyanagi Kimura. The specific plants by floristic region were 7 taxa including Salix chaenomeloides Kimura, Aristolochia contorta Bunge, Actinostemma lobatum Maxim., Artemisia selengensis Turcz., Cirsium pendulum Fisch., Alisma plantago-aquatic var. orientale Samuels. and Carex versicaria L.. The naturalized plants were 47 taxa including Fallopia dumetorum (L.) Holub., Chenopoidum album L., Silene armeria L., Brassica juncea (L.) Czern., Melilotus alba Medicus, Trifolium pratense L., Oenothera erythrosepala Borbas, Ipomoea hederacea var. integriuscula A.Gray, Bidens frondosa L., Matricaria inodora L., Xanthium canadense Mill., Panicum dichotomiflorum Michx. and so forth. In life forms, megaphanerophytes (M) were 13 taxa, 13 taxa in nanophanerophytes (N), 14 taxa inchamaiphytes (Ch), 40 taxa in hemicryptophytes (H), 20 taxa in geophytes (G), 103 taxa in therophytes (Th) and 22 taxa in hydrophytes (HH). The ratios of the naturalized index (NI), the urbanized index (UI) and the disturbed index (DI) were 20.9%, 14.6% and 18.2% in all sites.