herbs or undershrubs. Lower leaves opposite, upper ones sometimes alternate,
petiolate, ovate. Capitula in dense terminal corymbs, homogenous, discoid,
pedunculate, involucre campanulate. Bracts 2-3 seriate, oblong-elliptic or
elliptic-lanceolate, herbaceous, receptacle conical, naked. Corolla tubular,
5-lobed, sometimes hairy. Anthers acutely appendiculate at the apex, obtuse at
the base. Styler arms slender, exserted, obtuse at the tip. Cypsela oblong, 4-5
ribbed, pappus of 5-paleaceous scales.