Erect, branched herb to 70 cm tall, sometimes rooting at the lower nodes; stems pilose with weak spreading hairs on emerging, soon glabrescent, often reddish, fistulose. Leaves opposite, ovate, to ovate-lanceolate, apically acuminate or rarely acute, basally obtuse or rounded, the margins entire or weakly serrate, glabrate; petiole 5-30 mm long. Inflorescence mostly a solitary head but sometimes a loose cluster of heads; peduncles slender, elongate, ascending and overtopping the leaves, to 9 cm long, glabrate. Heads 5-8 mm across, mostly radiate, becoming elliptical or conical, to 12 mm long; involucral bracts ca. 8, slightly imbricate, oblong, apically erose or mucronulate, the margins hyaline, the midvein darker than the lamina and basally impressed; receptacle fusiform, 5-7 mm long, basally 1 mm across; paleas stramineous, apically colored, enfolding the florets; ray florets few, inconspicuous, ca. 5 mm long, the corolla yellowish, ca. 3 mm long, the limb 3-nerved, apically truncate or obscurely 3-dentate, the tube ca. 1 mm long, pubescent on the 2 angles, the androecium wanting, the style branches drying dark orange, not evidently papillose, the style base expanded, stipitate above the ovary, the ovary strongly 3-angled, sparingly pubescent between the angles and sometimes inconspicuously tuberculate on the dorsal surface, otherwise resembling that of the disc florets; disc florets numerous, ca. 4 mm long, the corolla tubular, the 5 deltoid lobes oblique to the tangential axis of the head, papillose on the dorsal surface, the stamens 5, the anthers ca. 0.5 mm long with deltoid appendages and coherent adjacent basal auricles, the anther collar indistinct, the style branches yellow or orange, truncate and apically papillose-fringed, the style base globose, much expanded, the ovary laterally compressed, almost flat, obovate in outline with a small apical umbo below the style base. Achene black, 1.5 mm long, the pericarp transparent with a yellowish cast, the margins thin, long-ciliate, the testa black, shiny, finely striate; pappus of 2 weak bristles.