Annual herbs. Leaves sessile, pinnately veined. Capitula discoid (in Australia) or radiate, pedunculate, calyculate; involucral bracts free or rarely fused. Florets: corolla limbs variously coloured; anthers ecaudate; style branches angled upwards, crowned with papillae, with a long tapering terminal appendage. Achenes homomorphic, obloid. Pappus caducous.