• HOME
  1. 日本語
  2. English
• Personal Info.
  1. CV
  2. For candidates
  3. Give me job!
  4. Recent(?) Photos
  5. Master/doctor theses
• Education
  1. Catalog
  2. HUSTEP
  3. Ecology
  4. Natural env. studies
  5. Environ. conserv.
  6. Field trip for Env. Res.
     
  7. Eco-campus(plants)
  8. Symbiosis in nature
  9. Beadroll
  10. Glossary(References)
• Research
  1. Abstract
  2. Volcanic succession
  3. Wildfire ecology
     
  4. Wetland conservation
  5. Skislope vegetation
  6. Mining
  7. Pub: English
  8. Pub: Japanese
• Hobby · Link
  1. Yoshida
  2. Plant taxonomy
  3. Plants
  4. Cup of tea
  5. Western Australia
  6. Link
  7. Contact

(First upload on October 13 2014. Last on January 18 2021) [ 日本語 | English ]

Ambrosia L. (ブタクサ) Butakusa (ブタクサ, 豚草), common ragweed. annual ragweed, or low ragweed Lifeform: annual forb Distribution: native to the North America and now widespread in the world assigned as a specified foreign species (要注意外来生物) by the Ministry of Environments of Japan Hokkaido Blue List: A2

Habitat: disturbed sites, such as roadsides and riversides Pollen: a source of pollen allergy (花粉症) Use: phytoremediation by remediating soil pollution for removing heavy metals such as lead from contaminated soil Synonyms: Ambrosia artemisiifolia L. var. elatior (L.) Descourt. Ambrosia elatior L.

Ambrosia artemisiifolia in Hokkaido

---

1 2 3
4 5 6
7 8 9
[1] along a paved road in N23/W3, North Ward, Sapporo, on October 26 2017. [2/3] within the caldera rim of Mount Usu (有珠山, flora) on August 20 2014. Due to the fate of annual plants, this tiny plant flowered. [4/5] at the rest house near the parking lot on Mount Koma (駒ヶ岳, flora), southern Hokkaido, August 27 2016. [6] on a river bank along Sorachi River, central Hokkaido, on June 28 2017. [7-9] along a paved road in N17/W5, North Ward, Sapporo, on October 6 2020. Records: at Road Station Toyoura on September 7 2020. at a backyard of Takahara Restaurant on the foot of Mount Koma on September 7 2020.