Plant Form: Annual rosette herb.
Size: 30 cm to 1.1 m tall.
Stem: Dark green to purple. Flower stems have gland based hairs.
Leaves: Up to 35 cm long, entire to dissected, often with larger end lobe, edges are toothed, pointy 'ears' at base.
Flowers: Dandelion-like, yellow flowerheads 5-6 mm across, with naked or glandular leaves underneath.
Fruit and Seeds: 2-4 mm long, flattened, ribbed and wrinkled on surface, with parachuting hairs up to 8 mm long.
Habitat: Cultivated and disturbed areas, pastures, gardens, wasteland, pavement.
Distinguishing Features: Differs from Prickly sowthistle (Sonchus asper) and native Sonchus species in its softer leaves (versus leathery leaves).
Impacts: Competes with and contaminates crops, outcompetes native vegetation, host of pests and diseases.