western water hemlock

Douglas' water hemlock, Cowbane, Wild parsnip

Height: 2 - 8 feet

Flower Color: White 

Leaves: Bright green, compound pinnate (arranged along smooth, hollow stems)

Habitat: Wet saturated soils (stream banks, irrigation ditches, marshes, wet meadows)

Growing Season: Early spring to late summer

Best Time to Treat: Late spring or early summer

• Very toxic to humans and livestock
• Most toxic plant native to North America  
• Roots are the most toxic part 
• Green seed heads are also very poisonous