• 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 July 12 2013. Last on April 1 2026) [ 日本語 | English ]

Cicuta L. (ドクゼリ) Dokuzeri (ドクゼリ, 毒人芹), cowbane or northern water hemlock Oozeri (オオゼリ, 大芹) Lifeform: perennial forb Distribution: the Eurasian Continent, including Japan (Hokkaido - Kyushu) Habitat: wetlands Leaf stalk: longer than Oenanthe javanica (セリ) Flowering: June to July in Sapporo Fruit: essential oil Synonyms (discarded): - var. nipponica (Franch.) Makino

f. angustifolia (Kit.) Schube (ヒメドクゼリ) (syn. var. stricta K. F. Schultz) Stem: shorter than C. virosa Distributed more in the wetlands of Hokkaido and Tohoku 🚑 One of the three major poisonous plants (日本三大有毒植物) to misidentify it as an edible plant, Oenanthe javanica (セリ) Toxin: distributed throughout the whole plant, paricularly in the rhizomes, including polyynes such as cicutoxin and cicutin Lethal toxin: cicutoxin (from genus name) convulsant toxin (acting primarily on the CNS) → tonic seizures and respiratory distress → death

Cicuta virosa in Hokkaido

---

1 2 3
4 5 6
7 8
[1/2] non-flowering shoots along a tiny trail for looking around small islands in O-numa Park, southern Hokkaido, on July 7 2013. [3] at the former Upper-Sarobetsu Visitor Center, northern Hokkaido, on April 24 2016. [4-6] along Atsuma Coast (浜厚真), central Hokkaido, on August 2 2022. [7/8] in Jindai Botanical Gardens Aquatic Plant Garden, Chofu, central Japan, on July 30 2025.