| Cicuta douglasii (DC.) Coult. & Rose |
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Family | Umbelliferae — APG family: Apiaceae |
Synonyms | Cicuta occidentalis Greene., Sium douglasii DC. |
Description | Stout; stems single or few together, from tuberous-thickened and chambered roots; leaves 1-3-pinnate; leaflets lanceolate-ovate to oblong, serrate; involucral bracts mostly lacking; umbels several; rays 12-20, 2-6 cm long; pedicels 3-8 mm long; fruit ovate to orbicular. |
Ecology | Marshes, along streams; the northernmost localities are from hot springs. De- scribed from northwest north America. |
Uses | The roots contain cicutotoxin, and are deadly poisonous. |