DOI QR코드

DOI QR Code

New records of two alien plants, Juncus torreyi (Juncaceae) and Egeria densa (Hydrocharitaceae) in Korea

  • 투고 : 2023.02.13
  • 심사 : 2023.03.23
  • 발행 : 2023.03.31

초록

Naturalized populations of two alien plants were newly found, and we describe their morphological characteristics and habitats with photographs. One is a member of Juncaceae, Juncus torreyi Coville, and was newly found at a pool of a beach in Gangwon-do. This rush is native to North America and belongs to the sect. Ozophyllum (subgen. Juncus) according to certain morphological characteristics, such as its racemose inflorescence, the absence of floral bracteole, and unitubular leaves with perfect septa. J. torreyi is easily distinguishable from Korean rushes by its long rhizomes with swollen nodes and globular head with 25-100 flowers. Its introduction into Japan and Europe was reported, but the ecological risk associated with its over-dispersal is not known. The other alien plant is a submerged plant, Egeria densa Planch. (Hydrocharitaceae), which was found in streams in Gyeongsangbuk-do and ditches in the Busan-si area, both of which being in the watershed of the Nakdong River. Egeria densa is similar to Hydrilla verticillata (L.f.) Royle, which is native to Korea. However, it is distinguished from H. verticillata by its larger flowers and lack of overwintering organs. This alien plant is native to South America and was introduced for aquarium gardening and naturalized around the world. Egeria densa is treated as a malignant weed due to its asexual reproduction and rapid growth. Size changes and the number of populations of E. densa must be investigated.

키워드

참고문헌

  1. Bijmoer, R., M. Scherrenberg and J. Creuwels. 2022. Naturalis Biodiversity Center (NL) - Botany. Naturalis Biodiversity Center. Occurrence dataset. Retrieved Jan. 20, 2023, available from https://doi.org/10.15468/ib5ypt.
  2. Brooks, R. E. and S. E. Clements. 2000. Juncus. In Flora of North America, Vol. 22. Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in Part), and Zingiberidae. Flora of North America Editorial Committee (ed.), Oxford University, New York. Pp. 211-255.
  3. Cook, C. D. K. 1996. Aquatic Plant Book. SPB Academic Publishing, Amsterdam, 228 pp.
  4. Cook, C. D. K. and K. Urmi Koenig. 1984. A revision of the genus Egeria (Hydrocharitaceea). Aquatic Botany 19: 73-96. https://doi.org/10.1016/0304-3770(84)90009-3
  5. Drabkova L. Z. and J. Kirschner. 2013. Oreojuncus, a new genus in the Juncaceae. Preslia 85: 483-503.
  6. Gil, H.-Y., D.-K. Kim, H.-J. Kim, K. S. Chang, K. Choi and S.-H. Oh. 2019. Illustrated Juncaceae.Eriocaulaceae.Typhaceae of Korea. Korea National Arboretum, Pocheon, 255 pp.
  7. Global Invasive Species Database. 2023. Species profile: Egeria densa. Retrieved Jan. 27, 2023, available from http://www.iucngisd.org/gisd/species.php?sc=289.
  8. Jang, C.-S. and B.-U. Oh. 2016. A taxonomic study of Korean Juncus based on the anatomical characters. Korean Journal of Plant Taxonomy 46: 392-404. https://doi.org/10.11110/kjpt.2016.46.4.392
  9. Kang, E. S. H. G. Kim, M. J. Nam, M. J. Choi and D. C. Son. 2022. New record and prediction of the potential distribution of the invasive alien species Brassica tournefortii (Brassicaceae) in Korea. Korean Journal of Plant Taxonomy 52: 184-195. https://doi.org/10.11110/kjpt.2022.52.3.184
  10. Kang, E. S., S.-R. Lee, S. H. Oh, D.-K. Kim, S.-Y. Jung and D. C. Son. 2020. Comprehensive review about alien plants in Korea. Korean Journal of Plant Taxonomy 50: 89-119. https://doi.org/10.11110/kjpt.2020.50.2.89
  11. Kim, J.-H., S. D. Shim, K. T. Cho, H. S. Kim, C. W. Hyun and J. H. Park. 2022. New record of an alien plant, Verbena bracteata (Verbenaceae) in Korea. Korean Journal of Plant Taxonomy 52: 196-200. https://doi.org/10.11110/kjpt.2022.52.3.196
  12. Kim, S. and S. Kim. 2013. Diagnostic characters of Juncus (Juncaceae) species in Korea. Korean Journal of Plant Taxonomy 43: 196-207. https://doi.org/10.11110/kjpt.2013.43.3.196
  13. Kirschner, J., S. Snogerup, V. S. Novikov and T. Ahti. 2002. Species Plantarum: Flora of the World. Part 6, 7, 8: Juncaceae. Australian Biological Resources Study, Canberra, Part 6, 237 pp, Part 7, 336 pp, Part 8, 192 pp.
  14. Les, D. H., M. L. Moody and C. L. Soros. 2006. A reappraisal of phylogenetic relationships in the monocotyledon family Hydrocharitaceae (Alismatidae). Aliso 22: 211-230. https://doi.org/10.5642/aliso.20062201.18
  15. Na, H. R. 2010. Sexual system and systematic of Hydrilloidea (Hydrocharitaceae). PhD dissertation, Ajou University, Suwon, Korea, 203 pp. (in Korean)
  16. Shimizu, T. 2003. Naturalized Plants of Japan. Heibonsha, Tokyo, 337 pp. (in Japanese)