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Family: Asteraceae Scientific name: Gymnocoronis spilanthoides Description: Plant Form: Upright perennial mat forming herb. Size: Up to 1 m tall. Stem: Ribbed, pale green, erect to prostrate with age. Somewhat hollow. Leaves: Dark green, 5-20 cm long tapering at end, with serrated and wavy edges, on short stalks. Flowers: White pom-pom-like flowers up to 2 cm diameter in groups at the end of stems. Fruit and Seeds: Seeds are yellowish brown, 5 mm in diameter, and ribbed. Habitat: Creeks, floodplains, dams, wetlands, can grow fully submerged. Distinguishing Features: Somewhat hollow stems, and combination of characteristics distinguish from Siam weed (Chromolaena odorata), Crofton weed (Ageratina adenophora) and Hygrophila species. Weed Status: Priority Weed Weed Type: Environmental Lifeform: Herbaceous
