| Blue Cohosh |
| Caulophyllum thalictroides|
| Uses: Medicinal/Poisonous!
|| Duration: Perennial (hardy in zones 3-9) |
| When to Sow: Late Summer/Early Fall
|| Ease of Germination: Difficult/Special Treatment Required |
Much esteemed by the Amerindians to aid labour, check excessive menstruation, and treat abdominal and urinary problems. Has potential as a contraceptive on account of its estrogenic properties.