Sigesbeckia

Annual herbs; stems, leaves and peduncles softly pubescent. Leaves opposite, petiolate or subsessile, simple, ovate to lanceolate, margins irregularly toothed. Capitula radiate, few-flowered, in lax, leafy panicles. Involucre campanulate or hemispherical; bracts in 2 rows: outer bracts spreading or reflexed, spathulate, long, with stalked, viscid glands and multicellular hairs, inner bracts +/- enclosing ray cypselas. Receptacle convex; paleae embracing disc florets. Ray florets female, fertile, small; corolla yellow, strap-shaped, minutely 2- or 3-lobed. Style branches short, linear, obtuse. Disc florets bisexual, fertile or inner functionally male; corolla yellow, tubular, 3-5-toothed. Anthers slightly eared at base, with small apical appendage. Style terete, slightly swollen at base; with oblong branches. Cypselas ovoid-oblong, often incurved. Pappus 0. x = 10 (aneuploids, high polyploidy).