Greek koris — a bug; opsis — like, as the achenes resemble a beetle or tick.
Annual or perennial herbs or shrubs, glabrous to hairy. Stems erect or ascending. Leaves along stems, opposite or alternate, margins entire to divided. Capitula radiate, terminal, solitary or in corymbs or panicles, with long stalks. Involucral bracts in about 2 rows, overlapping, unequal. Receptacle with scales, flat or convex. Ray florets sterile or female, ligulate, yellow, often brown at base. Disk florets bisexual, tubular, yellow or brownish. Achenes ovoid, compressed, often winged or with thickened margins. Pappus of 1 or 2 simple or barbed bristles, and/or short teeth, a crown or absent.
One species has become naturalised in Australia, usually in disturbed sites.
Winged, beetle-like achenes, usually with a short pappus of teeth or bristles.
About 114 species from N and S America.
Source: (2002). Asteraceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.