Annual or perennial, erect or procumbent or scapose herbs with multicellular, often gland tipped hairs. Leaves simple, opposite, densely pubescent, on winged petiole. Capitula small, radiate, many flowered, mostly in terminal and axillary paniculate cymes. Involucre turbinate to campanulate. Phyllaries 2–seriate, dimorphic, outer ones 5, longer than inner, linear–spathulate, divaricate, with thick glandular hairs, inner much smaller, erect. Receptacle flat, paleate, paleae scarious, outer paleae cucullate, each enclosing ray cypselas.  Ray florets yellow, white or with pinkish tinge, female, uniseriate, shortly ligulate. Disc florets yellow or creamy white, bisexual, tubular, substanded by receptacular paleae enclosing cypselas, corolla 5–toothed. Style arms short and flattened.  Anther appendages ovate to lanceolate. Cypselas elongate–obovate, compressed, 4–angled. Outer ray cypselas brown–blackish, ± curved, apex truncate. Pappus absent.

A small genus of about 12 species, widely distributed in tropical and temperate regions, most of the species are centered in Mexico. Represented by the following species in Pakistan.