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The vegetation and plant resources of Paeaknokdam, the crater of Mt. Halla, was investigated from 1996 to 1998. The vegetation was classified into Diapensia lapponica var. obovata-Tofieldia fauriel association and Festuca ovina-Carex erythrobasis association. The latter was divided into Rhododendron...

The vegetation and plant resources of Paeaknokdam, the crater of Mt. Halla, was investigated from 1996 to 1998. The vegetation was classified into Diapensia lapponica var. obovata-Tofieldia fauriel association and Festuca ovina-Carex erythrobasis association. The latter was divided into Rhododendron mucronulatum var. ciliatum-Empetrum nigrum var. japonicum subassociation, which was composed partly of Abies koreana-Betula ermani var. saitoana variant. The plant resources of 162 taxa were composed of 49 families, 122 genera, 127 species, 2 subspecies, 30 varieties and 3 formae, of which 63 taxa were newly found in this area. Among the investigated plants, 27 taxa were endemic to Korea or Cheju islands, 39 taxa were rare or endangered, and 65 taxa were identified as alpine plants. One hundred and twenty-one taxa(75.6%) were identified to be useful: 82 for ornament, 75 for medice, 66 for food, 17 for nectar-producing, 15 for pasture, and 10 for industry.

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