This study was conducted to provide scientific information for establishing efficient and systematic measures for nature conservation and management in Manjang-gul lava tube. The number of vascular plants was 204 taxa (82 families, 176 genera, 144 species, 1 subspecies, 26 varieties and 1 forma). Of those, pteridophyte were 5 families, 12 genera, 14 species and 1 variety and gymnosperm were 4 families, 6 genera, 5 species and 1 variety. Seventy three families, 149 genera, 157 species, 1 subspecies, 24 varieties and 1 forma in angiosperm composed of 62 families, 123 genera, 137 species, 1 subspecies, 17 varieties and 1 forma in dicotyledon and 11 families, 26 genera, 20 species and 7 varieties in monocotyledon. The number of naturalized plants was 9 families, 17 genera, 18 species and 3 varieties, totaling 21 taxa.

• 도재화(국립산림과학원 난대산림연구소) | Jae-Hwa Tho
• 김찬수(국립산림과학원 난대산림연구소) | Chan-Soo Kim Corresponding Author
• 문명옥(제주대학교 생명과학과) | Myong-Ok Moon
• 강창훈(제주대학교 생명과학과) | Chang-Hun Kang