Lance-leaved tickseed (Coreopsis lanceolata) is one of the obnoxious weed species. It is native to North America and considered an invasive alien species in Japan (Refer to the article on 5/18/2022). It seems that it reproduces twice more in Japan than in the native areas. Lance-leaved tickseed: https://en.wikipedia.org/wiki/Coreopsis_lanceolata


Yoriko Hatase et al. reported some of their studies. “The Control Effect of Season and Time of Mowing On Coreopsis Lanceolata An Invasive Alien Species” (2010), Journal of The Japanese Institute of Landscape Architecture, 73(5), pp. 421-426. “Restoration Effect of Topsoil Removal on the Herbaceous Community Invaded by Coreopsis lanceolata in the Vegetation of Dry Gravel Riverbeds” (2012), Journal of The Japanese Institute of Landscape Architecture, 75(5), pp. 445-450. [Japan Wildlife Research Center, Ministry of Land, Infrastructure, Transport and Tourism, National Institute for Land and Infrastructure Management]
Similarly, kudzu or kuzu (Pueraria montana), native to Japan and southeast China, is considered an invasive alien species in the United States. It is a terrifying species in the southeastern United States. Kudzu (Pueraria montana): https://en.wikipedia.org/wiki/Pueraria_montana
Kudzu: The Invasive Vine that Ate the South, The Nature Conservancy (https://www.nature.org/en-us/about-us/where-we-work/united-states/indiana/stories-in-indiana/kudzu-invasive-species/). It was brought to the United States in 1876 as ornamental; however, it was used for erosion control from 1930s-1950s, and then it spread.
Kudzu (Pueraria montana in the botanical family Fabaceae) in the United States is like the one-seeded bur cucumber or star-cucumber (Sicyos angulatus in the botanical family Cucurbitaceae, native to eastern North America) in Japan. Although they belong to the different families, both are vine plants and have similar characteristics. And they are notoriously invasive weeds in the two countries.
Sicyos angulatus – Invasive Species of Japan (https://www.nies.go.jp/biodiversity/invasive/DB/detail/80220e.html); Assessing the Ecological Impact of Alien Species and Managing the Risks (https://www.naro.affrc.go.jp/archive/niaes/rp/eng/rp03.html); Sicyos angulatus (https://en.wikipedia.org/wiki/Sicyos_angulatus).

































































