Canada

Fireweed

Senecio madagascariensis

Flowers/Seedhead: Inflorescence a loose cluster of flowerheads. Flowers all year, chiefly autumn to late spring.

Description: Mostly erect annual or biennial herb to 70 cm high. Leaves variable, to 8 cm long and to1.5 cm wide.

Distinguishing features: Distinguished by lanceolate to elliptic leaves that are not deeply dissected; bracts around flowerheads (involucral bracts) 19–21 in one row, these bracts to 6 mm long; 12–15 petal-like yellow ray florets with strap-like parts to 1 cm long; seeds to 2.5 mm long topped by hairs (pappus) to 6.5 mm long.