Asteraceae

Senecio jacobaea

Tansy Ragwort

Stems erect, unbranched, solitary to few, alternate. Lower leaves 8–10 in., deeply pinnately divided; lower leaves falling by bloom time. Flower heads numerous, closely clustered on short stalks, atop stem. Flower head with 13 ray flowers, 1/3 in. central disk. Grows on roadsides, disturbed soils, at low and mid elevations. Originally from Eurasia. Invasive in pastures and fields, very toxic to cattle and horses.

• Rarity: Common
• Flowering Time: All Summer
• Life Cycle: Perennial
• Height: 2--4 feet
• Habitat: Coastal, Meadow, West-Side Forest, Disturbed
• Found In: Olympic Np, Mt. Rainier Np, N Cascades Np
• Native: No