Heads many-flowered, homogamous. Involucre imbricate, scales herbaceous, acute. Receptacle naked. Corolla with a slender tube, and bell-shaped, equally 5-fid limb; lobes lanceolate, margined. Anthers short, included. Style shortly exserted, its branches subulate, bristly. Achenes inversely pyramidal, 4-angled, 4-ribbed, glabrous, glandular between the ribs, truncate, and 4–5-angled at the summit. Pappus an entire, thickened, marginal rim. Erect, branching, leafy, herbaceous plants. Leaves alternate, entire or serrated, pellucid-dotted. Flower-heads small, in a much-branched corymb. Flowers red or purple.