Glandular-pubescent, strong-smelling, annual herb. Leaves oblong, oblanceolate or lanceolate, the lowermost narrowed to linear, apex acute or obtuse, mucronate, margins repand or denticulate; involucral bracts subuniseriate, lanceolate, glandular. Ray florets yellow. Disc florets yellow. Flowering time all year. Cypselae polymorphic, straight or curved, wingless or irregularly winged, beaked or not, obovoid, obconic, cylindric or fusiform, with or without an apical cavity, smooth or transversely wrinkled.
Sprawling, foetid annual, up to 400 mm tall. Leaves oblanceolate, toothed, 10-40 mm long. Flowerheads few at branch tips, radiate, yellow, 10 mm diam. Cypselas mostly irregularly warty.
Sprawling, foetid annual to 40 cm. Leaves oblanceolate, toothed. Flower heads radiate, small, few at branch tips, yellow. Achenes mostly irregularly warty.